Questions about both circles and various types of polygons are some of the most prevalent types of geometry questions on the ACT. Polygons come in many shapes and sizes and you will have to know them inside and out in order to take on the many different types of polygon questions the ACT has to offer.

The good news is that, despite their variety, polygons are often less complex than they look; a few simple rules and strategies are all that you need when it comes to solving an ACT polygon question.

This will be your complete guide to ACT polygons—the rules and formulas for various polygons, the kinds of questions you’ll be asked about them, and the best approach for solving these types of questions.

If you want to excel on the TOEFL, one of the skills you need is a strong vocabulary. Many TOEFL questions either ask you the definition of a word outright or require you to have knowledge of certain words in order to answer a question correctly.

The best way to learn new vocab is to use flashcards, which is why we've created printable flashcards of the 327 TOEFL vocab words you must know for the test. We'll also discuss the best method for studying your TOEFL vocabulary flashcards and give reviews of some of the other TOEFL flashcard sets that are available.

In 2014, the College Board released a giant 210-page specification for the redesigned SAT which first started being implemented in the Spring of 2016.

We’ve read through this document page by page so you don't have to. This article is a new SAT guide that will go through the most relevant points for students, parents, and educators to understand about the new SAT test. We'll dig deeper than most of the guides out there, which seems preoccupied with superficial changes like easier vocabulary and the shift to a 1600 scale.

Many juniors and even sophomores take the PSAT every fall to prepare for the SAT. But the PSAT isn’t a college admission test, so do you actually need to prep for it? The reality is, PSAT prep can strongly benefit you, especially if you're hoping to nab a National Merit scholarship or get a high score on the SAT

In this article, we explain why PSAT prep is important and go over how to prepare for the PSAT using five simple steps. In addition, we discuss what kinds of resources are ultimately unnecessary for quality PSAT preparation as well as how PSAT prep differs from SAT prep.

What can you substitute for vegetable oil? Can you substitute olive oil for vegetable oil? In this article we will help you figure why you might want a substitute for vegetable oil and give five vegetable oil substitutes you could use.

Studying statistics? Then you've likely heard the phrase "normal distribution" when describing data. But what about the phrase "skewed right"? What does a right-skewed histogram look like? And what causes it?

In this article, we give you examples of histograms skewed to the right and explain how these differ from normal distribution graphs.

Deciding when to take the SAT can be stressful because the best test dates aren't the same for everyone. Levels of preparation, goal scores, and other academic conflicts should all be considered in devising the most logical testing schedule for each student. The following is a full description of the pros and cons of each SAT test date in the 2017-2018 school year for sophomores, juniors, and seniors. You can use this guide to come up with a game plan that works for you!

Integers, integers, integers (oh, my)! You've already read up on your basic ACT integers and now you're hankering to tackle the heavy hitters of the integer world. Want to know how to (quickly) find a list of prime numbers? Want to know how to manipulate and solve exponent problems? Root problems? Well look no further!

This will be your complete guide to advanced ACT integers, including prime numbers, exponents, absolute values, consecutive numbers, and roots—what they mean, as well as how to solve the more difficult integer questions that may show up on the ACT.

A probability question asks you to identify how likely a particular event is to occur. How likely is it that you’ll pick a red marble out of a bag? How likely is it that a particular person will be chosen out of a lottery? How likely is it that two or more events will both occur? These are just some of the many different types of probability questions you may encounter on the SAT.

This guide will take you through all aspects of probability you’ll need to know for the SAT—exactly what probability means, the typical probability questions you’ll see on the SAT math section, and the steps needed to solve them.

One of the trickier concepts that you will be tested on ACT English is your ability to choose the right word from among many that are not quite right, and to spot when words are being used incorrectly.

Are you confident in your ability to find the differences in a group of similar words? Can you distinguish what’s needed from the context of a question?

Many students take the PSAT in the fall of their junior year. What a lot of students may not notice is the full name of the test is PSAT/NMSQT, or Preliminary SAT/National Merit Scholarship Qualifying Test. Thus, the PSAT is not just good practice for your SATs. It's also the first step in becoming a National Merit Finalist and hopefully, earning a $2,500 scholarship from the National Merit Scholarship Corporation (NMSC).

In this article, we'll discuss what steps you need to take to become a National Merit Finalist and compete for a scholarship. We'll also give you advice on how to write a strong application and maximize your chances of becoming a National Merit Scholar.

Getting ready to start salsa classes? Awesome! Salsa dancing is a great way to exercise, meet new people, and have fun.

If you're preparing for your first salsa class, you may be wondering what to wear to salsa class. While most salsa dancing classes don't have a strict dress code, it's important to dress appropriately for the activity.

To do well on the SAT, you’ll need to have an SAT study plan. This plan tells you what, when, and how to prep for the SAT. It also helps you manage your time so that you’re not focusing too much (or too little) on certain topics and skills.

In this guide, we give you four SAT study plans to choose from, based on your SAT score goals. Before we dive into those, though, let’s go over the benefits of having an SAT study schedule and the preliminary steps you'll need to take to get your SAT plan off the ground.

On the newly redesigned 2016 SAT, the math section content is divided into four categories by the College Board: Heart of Algebra, Problem Solving and Data Analysis, Passport to Advanced Math, and Additional Topics in Math. Heart of Algebra accounts for the largest part of the SAT math section (33% of the test), so you need to be well prepared for it. In this post, I'll be discussing this category's content and question types, working through practice problems, and giving tips on how to ace these questions.

We present information about SAT test dates for the 2015-2016 school year here. We also link to our top articles that you must read before deciding on a test date.