Salt Chemistry Formula - Is Your Food Bad?

Salt Chemistry Formula - Is Your Food Bad?Salt is one of the most basic materials that are in any kitchen. This does not mean that you cannot find it in a complicated shape, however, it means that you have to pay special attention to the salt chemistry formula if you really want to maximize the nutrition in your food.Salt is just one type of element that can be found in every food, but it has to be noted that the concentration of sodium in a certain food determines the nutritional value of the food. In other words, the more sodium in a certain food, the less nutrients the food contains.When you see the amount of sodium in a food, you will know how much of it there is. The figure can differ between different foods, and the amounts of sodium in them can be different too. This means that you have to know the salt chemistry formula so that you can be able to cook your food perfectly.It is necessary for you to know the nutritional values of the food that you eat because you will be able t o determine how much of the chemical properties of the food are present. If you find out the quantity of potassium and calcium in a certain food, you will be able to know that you should be able to reduce the salt concentration in it.The problem with a lot of people is that they just buy whatever food they like from the supermarket, and then they do not cook their food properly. They find that they end up using a lot of salt. If you find the right salt chemistry formula, you will be able to prepare your food properly.A good recipe should also be able to get the best out of every food that you use. When you cook your food in a way that uses too much salt, you will end up using too much of the chemical property of the food that you are cooking. You will not be able to extract the most nutrients in it. You will end up getting all the nutrients from the food that you cook, but you will be using too much of the sodium. If you are able to get the amount of potassium and calcium right, you will be able to cook your food without consuming too much of it. That will allow you to be able to enjoy the healthy benefits of the food.Remember that you have to pay special attention to the salt chemistry formula in order to make sure that you are cooking your food properly. You should never take the wrong approach when it comes to preparing food, and you have to make sure that you follow the right guidelines for the health of your body.

My Mastering Chemistry - How Does It Work?

My Mastering Chemistry - How Does It Work?So what does My Mastering Chemistry really do? You're probably wondering about some of the basics here. What exactly does it do? Is it a long term program for advanced students or is it a one time thing for those who want to get a good grasp on this subject?The idea behind Masters is quite simple and will appeal to any type of chemist. It is a group of learners who have undergone a program that is similar to an advanced chemistry course. This is done with many small group discussions on a particular topic. Usually a question is asked by one of the participants, the response is a quick and basic answer and then the question is followed by another answer from the rest of the group. The process repeats over until all the answers are prepared.This process has been shown to greatly increase the speed at which new knowledge is acquired. This is not always the case in an actual chemistry course, especially if the actual class size is much larger. Th e group format works well for this and makes learning much easier and more efficient.If you've never taken a course like this before you should at least go for the sample course as it is best to see if it suits your needs. The sample has questions that the learner can answer and be sure to follow the normal course instructions. The main thing to remember is that you will need to spend some time to learn the techniques used in this course. Once you know how to do this, you will understand that the entire course is one big step forward.My Mastering Chemistry is a five day course with a lot of time for you to really dig into the material. By the end of the course you should have a better understanding of any subject that you've been studying.Overall you will get the same results from this course as you would from any other such course, just in a shorter period of time. The one thing that makes this program so popular is that you get to learn all you need to know in this short amount of time.At the end of this course you should feel confident in your ability to understand chemistry more thoroughly. You will be able to tackle new subjects and more difficult chemistry problems much more easily. This is a great way to get a jump start on whatever it is you may be working on.

Best Universities to Study Art

Best Universities to Study Art Art Schools in the UK and Abroad ChaptersWhat type of Art Program is Right for You?Best Arts Schools in the UKArt Universities AbroadFinding Jobs After GraduationProbably against your family’s best wishes, you’ve decided that you’re passionate enough in your creativity and artwork to pursue an art degree. As with any degree, there are many realities to keep in mind â€" everything from the financial viability of your degree in terms of job opportunities to how to market your artwork in a curatorial sense. The very first thing you should consider, however, is what exactly you want to do.Art is probably one of the vastest fields in the world, and for a good reason. Artwork has affected human activity since the beginning of recorded history, that very history actually having been pictorially depicted in the first place. This also means, of course, that there are an infinite amount of art degrees at your disposal. From basic drawing and painting qualifications to media arts to metalsmithing, even the most world-wea ry alumnus wouldn’t be able to detail all the different types of art programs that might interest you.Whether you’re aspiring to run your own art studio one day or dream of becoming a graphic designer, understanding what programs are available at which schools, both in the UK and abroad, is a vital step in choosing a university. This guide can give you a better idea of what types of art education are out there and how to get started on building your portfolio.Check here for the various art classes near me.From learning art theory to time in the art studio, find the right program for you! CalumDrama School Entrance Teacher 5.00 (15) £50/h1st lesson free!Discover all our tutors ToriSpanish Teacher 5.00 (1) £15/h1st lesson free!Discover all our tutors OliviaSchool support Teacher 5.00 (2) £21/h1st lesson free!Discover all our tutors MarkESOL (English) Teacher 4.76 (17) £20/h1st lesson free!Discover all our tutors YuweiChinese Teacher 4.33 (6) £19/h1st lesson free!Discover all our tutors JenniferMusic reading Teacher 5.00 (1) £30/h1st lesson free!Discover all our tutors LouiseAutoCAD Teacher 5.00 (3) £60/h1st lesson free!Discover all our tutors RickyPercussion Teacher 5.00 (7) £35/h1st lesson free!Discover all our tutors NicolasGuitar Teacher 5.00 (2) £35/h1st lesson free!Discover all our tutors MyriamOrganic chemistry Teacher 5.00 (13) £20/h1st lesson free!Discover all our tutors JonathanEconomics Teacher 5.00 (9) £40/h1st lesson free!Discover all our tutors Oluwakemi imoleMaths Teacher 5.00 (1) £30/h1st lesson free!Discover all our tutors AlexPhysics Teacher 5.00 (1) £50/h1st lesson free!Discover all our tutors AdamSinging Teacher 5.00 (14) £48/h1st lesson free!Discover all our tutors ValentiniMusic reading Teacher 5.00 (2) £50/h1st lesson free!Discover all our tutors MilenaMaths Teacher 5.00 (5) £25/h1st lesson free!Discover all our tutors RashmiEconomics Teacher 5.00 (1) £35/h1st lesson free!Discover all our tutorsWhat typ e of Art Program is Right for You?Before you start looking into which school of art will be right for you, there are some distinctions between study programs that you should take the time to learn.The area of art can typically be broken down into three broad categories: the visual arts, performing arts and literature. Obviously, there is a lot crossover that happens between these categories â€" but we will be focusing on the different types of programs within the first and second.Fine ArtsThe definition of fine arts is pretty broad and can be a bit confusing because of it. As mentioned, the bachelors and masters programs covered under the umbrella term fine arts includes a lot of crossover from all three categories of art. These programs can range from theater and photography specializations to illustration and digital media.The differences in the types of art that will be included in this degree will vary from university to university. That being said, there are many common program s you will find in this field. These can include:CeramicsSculpturePrintmakingArt designDrawing and PaintingStudio artsWithin each of these different categories, it is possible that you will find schools that deal specifically with these subjects. For example, a design program can be found both in universities with a focus on fashion as well as universities with general fine arts degrees.Film SchoolThat being said, film schools are an entirely different beast. While you may find film programs in a lot of different university programs, there is a copious amount of schools dedicated solely to developing the technical skills involved in film.This can mean that you can find lecture-based programs that specialize in components like film theory or universities in which you will be directing or filming movies the majority of the time. Some of the most common types of programs you will likely encounter in this kind of school are:Computer animationFilm and television productionPhotographyGame artArt HistoryAnother avenue to explore if you’re interested in learning more about your craft, or even if you don’t have any sort of artistic ability, would be to study art history. Whether you’re studying in a design school, taking art classes in an academy of art, or studying part-time in a college of arts â€" art history is one of those subjects you can find in nearly any university.There are many different types of art history programs you can study, either specializing in a specific period as a major in and of itself or simply choosing to study it in tandem with your bachelors or masters of fine arts.Refine your technical skills at a university for the artsBest Arts Schools in the UKWhether you’re looking into going to school at an art institute, liberal arts school with an art center, or simply sticking to visual art like painting and life drawing â€" any of the art schools you will be looking into will require tuition.If financing your art journey will be difficult for you, there are several options you can look into. Being close to the European Union, looking into more affordable schools in schools just a plane ride away can be a viable option. On the other hand, looking for scholarships within your college of art or government grants can also go a long way in relieving the cost burdens of your college tuition.That being said, here are the best universities in the UK to study architecture, art and design differentiated by the discipline they specialize in. The application requirements will also be different from school to school, so make sure to watch out for these distinctions.Film EducationArts University Bournemouth â€" this film program doesn’t just pride itself on being interdisciplinary, but it also has the record to show it. Responsible for producing award-winning films, it even has programs focusing on performance design.University of London Goldsmiths â€" London is clogged up with great, film-orientated schools. What makes this art college unique is that the courses in its arts degree includes things like script development and social activist film-making.University of Edinburgh â€" A giant amongst art schools, this university can lead to a powerful master or bachelor of fine arts. If you’re interested in learning more, check out their renowned film festival.Design EducationRoyal College of Art â€" If you’re looking for a school of design, look no further than this school of arts, which is often cited as being one of the most influential arts and design universities in the world.Fine Art CollegesUniversity College London â€" If you’re interested in looking at a variety of programs and courses, ranging from the bachelor all the way to the doctorate level, be sure to check out UCL’s Slade School of Fine ArtThe Glasgow School of Art â€" This university of the arts is one of the best center for arts in the UK not only because of its excellent reputation, but also because of the range of programs that it o ffers. Here, you can find everything programs in 3D modelling, painting and printmaking, or even engineering with architecture.ArchitectureUniversity of Sheffield â€" This university has actually been recognized as the best place to study architecture in the whole of the UK. Start by checking out their BA programs, which include Architecture, Architecture and Landscape, and Structural Engineering and ArchitectureNewcastle University â€" This university is worth looking into if you’re looking for a degree where you can study interior architecture and working on model-simulations.Art Universities AbroadWhether you’re looking for pre college programs to participate in, a four year arts education, or simply a semester abroad in collaboration with your college of fine arts â€" checking out universities in other countries can enrich your cultural and professional experience alike. Be sure to check out these schools around the world, both at their university art and the type of message they’re giving to a prospective student like you.Perhaps you’ll find the right school of art and design in North America:Parsons School of design, United StatesRhode Island School of Design, United StatesUniversidad Nacional Autonoma de Mexico, MexicoLooking for a European College of Art and Design?Politecnico di Milano, ItalyRoyal Danish Academy of Fine Arts, DenmarkInternational students looking for Art Schools on the African continent:University of Cape Town, South AfricaLagos School of Design, NigeriaTop universities in Asia for art and design:Tongji University, ChinaSeoul National University, KoreaNational University of Singapore, SingaporeArt majors can study in the UK or around the worldFinding Jobs After GraduationOne of the hardest things about university, whether you’re an undergraduate or have already been initiated into the art world, actually happens after graduating: finding a job.Whether you want to get your art work featured in galleries or are looking to scor e a spot as an artist in residence at a university, young artists should always try to get into contact with alumni. Getting student work into an exhibition or integrated in studio art is a struggle alumns will know well â€" try to get some advice from them!Some of the fields open to you can range from being an art teacher, art educators at museums, leaders in workshops around the world, being a regular feature in an exhibit, or even becoming a university provost.

What is it Like to Attend Portland State University

What is it Like to Attend Portland State University The tutors behind Varsity Tutors are not just here to teachtheyre sharing their college experiences as well. Austin is a Portland tutor specializing in English tutoring, French tutoring, public speaking tutoring, and a number of other areas. He is currently a senior at Portland State University majoring in arts and letters, French language and literature, history, and social sciences. See what he had to share about Portland State University: Describe the campus setting and transportation options. Austin: Portland State University is located in downtown Portland, Oregon. This central location in the city provides for a number of transportation options, including ample bicycle lanes, parking structures, and multiple lines of light rail. For this reason (and because of the diversity of student ages), few students live on campus. This means that the feel of the university is both omnipresent and absent from the citys heart. The boundaries of campus and city are not defined, and many students do not even live in the city of Portland itself. (This is my situation.) Portland is relatively safe (for a U.S. city), but that still leaves plenty of danger. The university has park blocks, or urban walkways with green space, which become unsafe during parts of the night. That being said, the daytime sees such heavy foot traffic that safety is not normally a problem. How available are the professors, academic advisers, and teaching assistants at Portland State University? Austin: There is little consistency in how available professors are. Academic advisers are available, but exactly how useful they are varies widely. Teaching assistants are not present in many classes, but they are often quite available. How would you describe the dorm liferooms, dining options, location, socialization opportunities with other students? Austin: Like the majority of Portland State University students, I do not live in the dorms. It would be unfair to merely spread hearsay, but given that Portland State University does not have a normal percentage of students living on or near campus, the dorms do not play such a central role as at some other universities and colleges. Which majors/programs are best represented and supported at Portland State University? Austin: Developmental psychology, conflict resolution, business, and engineering get a good showing at Portland State University, among others. That being said, rankings and self-elected specialities are always debatable. I am currently striving for four majors (social sciences, history, arts and letters, and French language and literature). I may or may not also earn a minor or two, depending on the next term. I would argue that the university did an often mediocre job of supporting my areas of study. Without comparing it to other institutions, it is still possible to say that my goals were as much hindered as they were helped. How easy or difficult was it for you to meet people and make friends as a freshman? Does Greek life play a significant role in the campus social life? Austin: I was incredibly engaged in my high school and had many great friends. A year later, I found myself reduced to tears, wailing to my mother about my lack of friends and even basic social engagement at Portland State University. Greek life does not play an important part in this university and its social life (or lack thereof). My way into a now much more satisfying social life was through working with a study-abroad company based at Portland State University that hires a diverse range of American and international students to welcome and support short-term study abroad students from East Asia. How helpful is the Career Center and other student support services? Austin: My future career choices are in academia, and therefore I have not attended these sessions. Instead, I seek out professors and ask how they got where they are. How are the various study areas such as libraries, the student union, and dorm lounges at Portland State University? Austin: Portland State University does have spacious study areas, but it is also the largest university in the state of Oregon, and so things can get crowded. Describe the surrounding town at Portland State University. Austin: Portland is a very dynamic city that is becoming increasingly popular. As previously mentioned, there is little to no distinction between Portland State University and Portland itself, in many cases. Portland State University is a few minutes away from major theatres and shopping malls, and it is relatively close to great hiking, two hours from the coast, less than that from Mount Hood, etc. How big or small is the student body? Were you generally pleased or displeased with the typical class sizes? Austin: Portland State University is the largest university in the state of Oregon, and it has many students in many classes. However, higher-level courses across departments may not be large even with a mix of Master and Bachelor students. Check out Austins tutoring profile. The views expressed in this article do not necessarily represent the views of Varsity Tutors.

What is a Stem and Leaf Plot

What is a Stem and Leaf Plot In a stem leaf plot of quantitative data, each value is divided into two portions- a stem and a leaf. Stem represented on a vertical axis whereas leaves of the corresponding stem will be represented on the horizontal axis. For an example 35, 39, 30 can be represented as 3 | 0 5 9 Where 3 is the stem and 0, 5 and 9 are the leaves. Example: - The following are the scores of 18 college students on a statistic test: 52 80 96 87 95 81 61 86 50 64 71 87 57 Construct a stem leaf plot. Solution: - To construct a stem leaf plot for these scores, we split each score into two parts. The first part contains the first digit, which is called stem. The second part contains the second digit, which is the leaf. Thus, for the score of the first student, which is 75, 7 is the stem and 5 is the leaf. We observe from the data the stem for all the scores 5, 6, 7, 8 and 9 because all scores lie in the range of 50 to 98. Now we will create the leaf for each of this stem. 5 | 0 2 7 6 | 1 4 7 | 1 8 | 0 1 6 7 9 | 5 6 Example: - Construct a stem leaf plot for the following data. 57 35 18 21 51 47 21 46 42 39 Solution: - 1 | 8 2 | 1 1 3 | 5 9 4 | 2 6 7 5 | 1 7

Planning a Yoga Retreat in India

Planning a Yoga Retreat in India How to Plan a Yoga Retreat in India ChaptersWhat to Expect Before You Go on a Yoga RetreatYoga: Living on an Ashram in IndiaPractising Yoga in an Ashram“Yoga is not a religion. It is a science, science of well-being, science of youthfulness, science of integrating body, mind, and soul.” - Amit RayA yoga session is a bit like a bubble of well-being. Be it breathing exercises, meditation, mindfulness, or alignment, daily yoga practice has become a ritual for a growing number of Britons and certain parts of India have become essential destinations for those wanting to do yoga effectively.In the UK, there are between 300,000 and 460,000 people regularly practising yoga. Of the 300 million yogis on the planet, more and more people in the UK are joining them to find moments of relaxation. This is why many people are also opting to attend yoga retreats in India, the home of yogic culture. India may seem far away and scary, especially when it comes to trying to organise a yoga retreat out there.Let’s have a quick look at what to expect in an Indian ashram and how you can enjoy yoga sessions on a retreat. CarleyYoga Teacher 5.00 (5) £100/h1st lesson free!Discover all our tutors LynnYoga Teacher 4.89 (9) £35/h1st lesson free!Discover all our tutors GenYoga Teacher £45/h1st lesson free!Discover all our tutors JulieYoga Teacher £30/h1st lesson free!Discover all our tutors AliceYoga Teacher £20/h1st lesson free!Discover all our tutors LauraYoga Teacher 5.00 (6) £70/h1st lesson free!Discover all our tutors UndramYoga Teacher £25/h1st lesson free!Discover all our tutors LottieYoga Teacher £10/h1st lesson free!Discover all our tutorsWhat to Expect Before You Go on a Yoga Retreat“Yoga is the dance of every cell with the music of every breath that creates inner serenity and harmony.” - Debasish Mridha By going to India, you can enjoy a different culture, different traditions, and a different way of doing yoga. (Source: Free-Photos)Heading to India to enjoy a retreat on an ashram is a good idea but you can’t just wing it. You’ll be heading off to a country that’s vastly different to the UK. There are different traditions, food, and everyday life to enjoy.The customs are different but so are the ways of going about things so get ready for an adventure! For example, don’t forget your visa, which can buy for around £20.Once you’re there, you’ll realise that each ashram is unique and you’ll need to do your research before you can head to the right one. After all, you’re looking for somewhere to find inner peace and somewhere to stay.  Unlike “yoga centres”, which don’t offer accommodation, ashrams include somewhere to stay day and night. If you stay for a few days or weeks (or even more), you’ll soon be a yoga master.Just like heading anywhere else in the world , there’s an ideal time of year to travel to India and learn to let go through yoga. The high season is in January and February whilst from May to September the weather is anything but mild. The rainy season is also a great time to enjoy quieter ashrams.  Similarly, October is the best time to head to India, especially when it comes to doing yoga. You’ll get more time with the instructors and a more relaxed environment.You should know that the ashram won’t cover the cost of the flights but they often provide a shuttle from the airport.Yoga: Living on an Ashram in IndiaYou may feel a bit overwhelmed when you first set foot in an ashram. Even if you’re prepared for your time there, you might still feel a bit stressed. You might be wondering how you should behave in front of the others. In reality, you’re not obliged to do anything. After all, those visiting ashrams are there to learn more about yoga. Being on an ashram isn't the same as attending a yoga class. (Source: jeviniya)Firstly, you don’t have to be passionate about yoga to head to an Indian yoga centre. The idea is to get into the practice, but you don’t need to be a yoga professional. Attendees are often young and inexperienced.Some ashrams even offer trips around the region or the chance to do charity work for the organisation. Generally, there are different options and packages available and it’s more than just a few yoga poses or a detox.However, while we’re talking about detoxes, let’s talk about new technologies. In most Indian ashrams, you can use your mobile phone, but it’s not recommended that you overdo it. After all, yoga is about finding your centre, not distractions.In terms of history, ashrams have existed for thousands of years and were generally isolated places away from distractions. The sages would spend time alone without any type of distraction or means of communication.This is an opportun ity to realign your mind, body, and spirit. This inward reflection encourages us to sympathise with others. Even though there may be other people from the UK, they’ll all be there to benefit from yoga on a personal level.It should be noted that meals are eaten in silence in most ashrams in an attempt to practise mindfulness.In most ashrams, English is widely spoken since it’s a common language amongst yogis around the world. The universal nature of yoga means it’s for sharing.You’ll eat ayurvedic vegetarian food. The water is often filtered for Western visitors.So what is the yoga on an ashram like?Practising Yoga in an AshramIt’s difficult to talk about a yoga retreat in an Indian ashram since each of them is so different. However, there are two main aspects of it: yoga and meditation. After all, that’s what you’re probably expecting. While yoga is practised all over the world, it's still very much an Indian creation. (Source: lograstudio)Meditation is the art of finding yourself, making the most of silence, harmonising with your body and mind, and rediscovering the connection with yourself. The instructors are there to help us do this in the best way possible.  The yoga practised can vary from ashram to ashram: Hatha yoga, Kundalini yoga, Vinyasa yoga, Yoga Nidra, etc. Do your research before you book your trip.There are yoga classes for everyone, regardless of their level. No matter your age, everyone is welcome and can do the lessons at their pace.You’ll want the most comfortable clothes possible while also adapting to the local traditions and styles. For example, nudity is not tolerated and neither is tight clothing.Don’t panic if you’ve only brought tight sports clothes, there are plenty of shops in town where you can get more suitable clothing. Some ashrams even have shops.Nowadays, yoga retreats are b ig business and are popping up everywhere. Of course, this means it’s harder to choose the right one, but in most ashrams, the yogic tradition is still at the heart of everything they do. Practising yoga in India will be an unforgettable experience. (Source: jpeter2)So what type of ashram will you look to visit? Ready to reconnect? If you're interested in teaching a yoga class when you return, you might want to join the many yoga teachers who've done their yoga teacher training in the home of yoga. Whether you want to focus on Ashtanga Yoga, Vinyasa Flow Yoga, Iyengar Yoga, Prenatal Yoga, or even yoga for beginners, there's a thriving community of yoga instructors who've learnt how to share the restorative yoga practice in its homeland.If you're looking for something a little closer to home, however, you can always find a yoga instructor in your local yoga studio or look for online yoga instructors on Superprof, for example. It's never been easier to learn yoga poses, breathing techniques, and enjoy guided meditation.If you'd like to get started with yoga, try the talented tutors on Superprof. There are plenty of tutors offering plenty of different types of yoga. Simi larly, there are three main types of yoga tutorial available, too: face-to-face tutorials, online tutorials, and group tutorials. Each type of yoga, tutor, and tutorial has its pros and cons so you need to think carefully before you pick your tutor.Face-to-face tutorials are between you and your tutor, allowing you to benefit fully from the tutor's expertise every second you're with them. They'll put together sessions and courses that are tailored to you. Of course, this bespoke service tends to come at a cost but since it's all done with you in mind, it makes this type of tutorial the most cost-effective you can get. If you've got the budget for them, these are the ones to go for.Online tutorials are also between just you and the tutor but your tutor won't be there in the room with you. Thanks to the internet, anyone with a decent webcam, microphone, and internet connection can get tutoring from anyone, anywhere. With fewer expenditures for travelling and the ability to schedule mo re tutorials each week, online tutors tend to charge less per hour than face-to-face tutorials. You may even get a tutor from India!Finally, group tutorials are available for those that are happy to share their tutor's time with others. Whether you and a group of friends opt to practise yoga together or you start attending tutorials with a group of strangers, these tutorials tend to cost less per person per hour since the whole group is paying for the tutor's time and expertise.

SAT Writing Online SAT Prep Online Tutoring Tutorpace

SAT Writing Online SAT Prep Online Tutoring Tutorpace Online SAT Writing Tutors are ready to Help You Getting a good score on the Writing portion of the SAT strengthens your overall score and shows you are able to create an argument and support it with evidence. Many students struggle to get the score they want, but achieving a high score doesnt have to be difficult. Tutor Paces writing tutors can help you understand the proper way to structure your paper so the SAT readers give you a better score. Our tutors have extensive experience guiding students toward success by teaching them to: Understand what the question is asking Create an argument that can be supported Choose the best evidence for your claim Because writing is only part of this section, our SAT Writing tutors will also work with you to strengthen your grammar and avoid common syntax mistakes.We cover following topics in writing: Grammar Usage Sentences and sentence errors Essay Personalized Writing Help No two students are the same, so Tutor Pace offers one-on-one, individualized tutoring sessions. In a private meeting with your tutor, you will be able to work on the areas in which you need the most help without having to worry about time. Most of our plans offer unlimited access to all of our tutors, so you can get as much personalized attention as you need in order to master the concepts that will let you succeed. No other online SAT Writing tutoring service can offer the value and quality of Tutor Pace. Unlock your potential and earn the score you deserve when you work with Tutor Paces team of certified tutors.