Whether you're brushing up on your trigonometry for the SAT or ACT or learning how to calculate angles for the first time, SOHCAHTOA is a useful mnemonic device to know. In this article, we'll explain what SOHCAHTOA is, how to use SOHCAHTOA, and give SOH CAH TOA examples.

It’s important for you to do well on the ACT, but doing well can involve additional ACT prep costs. But the truth is that additional ACT test prep—whether it’s in the form of study guidebooks, ACT prep courses, or one-on-one ACT tutoring—can raise your score quite a bit. If you’re trying to get into a competitive school, having a high ACT score is a critical part of your application.

Answering the question “how much does ACT prep cost” can be pretty tricky...but we’re here to help. In this article, we’re going to answer that question and give you an ACT prep cost comparison. Then we’ll walk you through the different types of prep and how much ACT prep classes cost, explain the positives and negatives of each, then give you some tips for choosing the right type of ACT prep for you.

So let’s jump in!

A huge number of books exist out there, ready and waiting for you to read them. Whether you prefer manga or ancient, epic poems, reading is great for all sorts of reasons.

What follows is a list of highly beneficial books to read in high school (or after!). These are remarkable books—books that made history, books that challenge societal perceptions of the world, and books that are quite simply interesting and moving. The books are presented in alphabetical order, and a short description is given for each book, as well an explanation of why it is worth reading.

Many students applying to private schools need to submit ISEE scores. The ISEE is known for being a tough exam, and preparing for it can help you reach the score you're aiming for. But where can you find the best ISEE practice tests? And how can you make the most of them? We've collected the absolutely best ISEE test prep resources, both free and paid, in this guide to help you with your ISEE studying.

Standard deviation is a way to calculate how spread out data is. You can use the standard deviation formula to find the average of the averages of multiple sets of data.

Confused by what that means? How do you calculate standard deviation? Don't worry! In this article, we'll break down exactly what standard deviation is and how to find standard deviation.

Do you know when to use a semicolon? Do you know how to use a semicolon? If not, don't worry! In this article, we break down exactly what semicolons are and how to use this unique (but often frustrating!) punctuation mark. We also go over what semicolon examples look like and give you tips for when to use and not use them.

"I have no idea what to expect" is not a sentence you want running through your mind on your way to take the SAT or ACT. If you take control of your test prep and schedule, then you shouldn't have any surprises on test day.

Besides studying, part of your preparation should be strategically planning out your SAT/ACT test dates. Instead of closing your eyes and pointing randomly at a calendar, you can ask yourself some key questions to figure out when the best SAT/ACT test dates are for you.

The first question that every student should ask herself, of course, is, When are my college deadlines?

Figuring out which classes you should take in high school is complicated! Not only do you have to navigate your school's requirements and college expectations, but you also have to take your own interests, abilities, and life into account. Because there are so many different questions you have to answer and decisions you have to make, it helps to start the planning process early.

We'll help you get a big picture perspective of what you are high school classes will look like with this guide. We'll also break down the details of the various high school course requirements, the kinds of choices you will have to make, and the exciting possibilities you will get to explore! If you're wondering what classes to take in high school, this guide should be a great launching point to figuring out your own personal plan.

In the increasingly competitive atmosphere of high school, you may be wondering how you can best all your classmates with a 5.0 GPA. It's a lofty goal, to be sure. In this article, we'll discuss why that goal is often impossible, or at least impractical, to meet, ways in which it may be possible to earn a 5.0, and what's really more important than a 5.0 GPA.

If you're an educator or have a student in school, you may have heard of the concept Vygotsky scaffolding. It may sound like a construction term, but Vygotsky scaffolding and the related concept of the zone of proximal development are teaching methods that can help students learn much more information much more quickly than they would with traditional instruction.

However, Vygotsky scaffolding is only effective if you know how to properly implement it; otherwise it can actually hinder a student's learning. Read this guide to learn what scaffolding and the zone of proximal development are, what the scaffolding psychology is, if studies have found these teaching methods to be effective, and how you can use these methods in the classroom to promote learning.

Getting your first job is really exciting—you have real-world responsibilities, and real-word money that you earned yourself, probably for the first time. In your teen years especially, the independence that comes with a part-time job is especially appealing. You get out of the house, meet new people, forge professional connections, and make your own savings and spending decisions.

But you probably have a lot of other things on your plate as well: school, extracurricular activities, family, friends, even college applications. How do you know whether getting a job is a good idea? In this post, I'll talk about the things you should consider before submitting those job applications. Hopefully you come away from this post with a better idea of whether getting a job is right for you.

Often mistaken for a fire sign because of their fierce independence, Scorpios are actually a deeply emotional and sensitive water sign. While they can be intimidating, Scorpios are also the most loyal friends and partners you could ever ask for, and as one of the most ambitious signs, they're amazing at creating connections and being their authentic selves.

College admissions can be confusing, with a lot of contradictory information thrown around. It's hard to separate fact from fiction, which is frustrating since the stakes are high and you may not realize you made mistakes until it's far too late.

In this exclusive article, we decided to consult university admissions officers and counselors around the country to break through the noise.

We asked them a simple question: "What's the #1 fact you wish college applicants knew about admissions?" The results might surprise you. 

Are you looking for ultra high-precision SAT percentiles? Official SAT percentiles released by the College Board only go as far as the ones place—this means you'll see only whole numbers such as 2, 56, and 93, without any decimals. But this isn't accurate enough for some test takers.

For this article, I've calculated SAT percentiles to six digits of precision (and, yes, every digit can help, especially if you're scoring at the high end!).

Not sure how to use Microsoft Excel? Then you've come to the right place! Microsoft Excel comes with most Microsoft suites and is a commonly recognized computer application that many of us use at one time or another.

While known primarily as a spreadsheet tool, Excel is constantly introducing new functions and is very useful even for people who only need it for basic tasks. With Excel, you can do things such as balance your household budget, make charts for presentations, and analyze data for businesses.

This Excel guide will take you through how to use Excel, including the basic functions, a few key advanced skills, and Excel tips and tricks everyone should know. I recommend following along in Microsoft Excel as you walk through this guide.