If you’re taking a geometry or trigonometry class, one of the topics you’ll study are trigonometric identities. There are numerous trig identities, some of which are key for you to know, and others that you’ll use rarely or never. This guide explains the trig identities you should have memorized as well as others you should be aware of. We also explain what trig identities are and how you can verify trig identities.

In math, an "identity" is an equation that is always true, every single time. Trig identities are trigonometry equations that are always true, and they’re often used to solve trigonometry and geometry problems and understand various mathematical properties. Knowing key trig identities helps you remember and understand important mathematical principles and solve numerous math problems.

Having your GED can open many doors for you, including getting a better job or being able to attend college, so you want to give yourself the best shot at getting a passing score. For most people, this means they’ll need to spend some serious time studying for the GED, and one of the best ways to prepare is to take GED practice tests.

This guide contains all the best practice GED tests available, including official, free, and paid practice tests. We explain where to find them, how much they cost, what each test’s pros and cons are, and we also give general advice on what to look for in a GED practice test.

Choosing which math classes to study can be one of the most challenging parts of planning your high school schedule. High schools offer numerous math classes, often at varying degrees of difficulty, and it can be difficult to know which math classes will be the best for you and your future.

Read this guide to learn about standard high school math curriculum, AP and IB math courses, which math classes colleges expect you to have taken, and ways to exceed those expectations.

You've probably heard of high school transcripts, but do you know what information they contain and why they're so important for applying to college?

This guide will explain what a high school transcript is, what exactly it includes, and why it is often the most important part of your college application.

Are you interested in improving your language skills, traveling, or experiencing new cultures while in high school? Study abroad programs are growing in popularity among high school students, and they are a great way to gain new skills and meet new people, although they can also be expensive and challenging if you aren't properly prepared.

Read on to learn what a high school study abroad program is, what the benefits and drawbacks are, and whether or not you should participate in one.

Have you heard of online high schools and are wondering if they're a good option for you? Are you unsure whether they're a flexible way to get a high school diploma or just an internet scam?

Read this guide to learn what an online high school is, what the pros and cons of attending one are, and how to decide if enrolling in a virtual high school is the right decision for you.

Is there a particular subject you'd like to study, but your high school doesn't offer it? You may be able to take an independent study!

Independent studies can be a great way to take a class your school doesn't offer but you'd still like to take, whether to strengthen your college applications, prepare for future jobs, or just out of personal interest.

Read on to learn about independent studies, what their benefits are, and how you can take one yourself.

Are you looking into online high schools and wondering if they're legitimate? Have you come across the word "accredited" and want to know what it means? Online high schools have been exploding in popularity in recent years, and, as more are created, it can be difficult to tell which are legitimate schools and which are little more than diploma mills.

Read this guide to learn more about online high schools, what it means for a school to be accredited, where to get an accredited high school diploma online, and how to ensure that you are choosing the best school for you.

Part of being a high school student is making a lot of decisions about which classes to take. While your foreign language courses may not be as critical to colleges as, say, which math classes you took, they are still something colleges look at and use to determine if you'd be a good fit for their school.

Also, if you play your cards right, the language you choose to study in high school could have a big impact on your future. I chose to study French and with my language skills I have been able to participate in an exchange with French high school students, get a job improving African schools, and spend a year in France teaching English.

I'll go over what colleges look for in foreign language study as well as the steps you need to follow in order to choose the best language for you.

When you think of how you want to spend your summer vacation, sitting in a classroom is probably not the first thing that comes to mind. However, summer school can be a great way for you to get ahead in high school and give yourself an advantage in college admissions.

These days students with all kinds of grades take summer classes. You might take summer school to understand a particular subject better, to free up more time in your schedule during the school year, or to take an advanced class at your high school, nearby college, or online.

Read this complete guide on summer school for high school students to learn everything you need to know about what summer school is, why people take it, and how you can use it to get ahead.

Are you thinking about future careers and wondering what different jobs are like? There are many job shadowing opportunities for high school students, and they're a great way to observe different jobs and help you decide which careers would be best for you.

Read this guide to learn about job shadowing for high school students, how you can find great job shadowing opportunities, and tips for making the most of your job shadow experience.

Are you hoping to increase your salary but aren't sure how to ask for a raise? Are you also wondering how much to ask for a raise or when to ask for a raise? Asking for a raise can be nerve-wracking, especially if you aren’t sure how to go about it, but we have all the answers you're looking for.

In this guide, we explain everything you need to know about asking for a raise, including the steps you need to have done beforehand, the best times to ask for a raise, how much you should ask for, and eight tips to keep in mind when you ask.

Wondering how to convert decimals to fractions? Or how to convert fractions to decimals? It’s easier than you think! Keep reading to see the steps for decimal to fraction conversions (including why you need to follow different steps if you have a repeating decimal), steps for fraction to decimal conversions, a handy chart with common decimal/fraction conversions, and tips for quickly estimating conversions.

A piece’s writing style can help you figure out what kind of writing it is, what its purpose is, and how the author’s voice is unique. With so many different types of writing, you may think it’s difficult to figure out the specific writing style of a piece or you'll need to search through a long list of writing styles.

However, there are actually just four main types of writing styles, and together they cover practically all the writing you see, from textbooks to novels, to billboards and more.  Whether you’re studying writing styles for class or trying to develop your own writing style and looking for information, we’ve got you covered.

In this guide, we explain the four styles of writing, provide examples for each one, go over the one thing you need to know to identify writing style, and give tips to help you develop your own unique style of writing.

Are you looking for ways to help others? Are you interested in community service and want to learn more about it?

Read this guide to learn what community service is, examples of community service, and how you can find service projects that interest you.