It's extremely important to have reliable books for learning and studying the material covered in AP classes. This is particularly true for AP Biology, considering the complexity and breadth of the content of the course. 

In this article, we'll tell you which books are your best bet for acing AP Biology and which ones you should use only at your own risk!

Practice tests are some of the best review tools for AP Psychology. They'll give you insight into your areas of weakness and prepare you for the structure and content of the actual test. We'll list all the official and unofficial practice tests available online and provide advice on how to use them to get a great score on the AP test.

Your senior year is coming up, and you're ready to blow those standardized tests out of the water once and for all. It's time to figure out the best study plan for you that still leaves time for summer jobs, shameful levels of ice cream consumption, and acquiring incomprehensible tan lines.

Follow these five steps to make the most of your summer studying before your SAT or ACT test date!

IB Mathematics: Analysis & Approaches Standard Level (SL) and IB Mathematics: Analysis & Approaches Higher Level (HL) (which are revised versions of the previous IB Math courses) are two of the toughest classes in the IB Diploma Programme curriculum, so it's no surprise if you need a little extra help in either class.

In this article, we've compiled the best free online materials for Analysis & Approaches SL/HL so you can get all the IB Math notes you need in one place. For convenience, we ordered the resources following the IB Math: Analysis & Approaches syllabus.

Taking the IB Economics exam will be nerve-wracking no matter what. However, taking practice tests with past papers beforehand will be a huge advantage since you'll get a sense of the test format and be used to the length and style of these past versions.

In this guide, we’ll familiarize you with the IB Economics assessment updates and let you know where to find past papers, both free and paid. We'll also give you tips on how best to use these IB Economics past papers for your preparation.

If you're an IB Geography SL/HL student in search of some extra help, you've come to the right place. Whether you're looking for IB Geography notes for a test on a single topic or cramming for the final IB Geography papers, this guide has all the information you need.

We created this IB Geography study guide using the best free and paid online materials for IB Geography and ordered the materials following the IB Geography SL/HL syllabus.

Are you taking AP classes in high school and want to know if you'll be able to get college credit for them? It's not always possible to get college credit from AP classes, but many high school students do. How can you be one of them? Read this guide to find out! We'll walk you through the process and answer all the key questions such as, "How many college credits is an AP class worth?" "Are AP classes college credit?" and "How many college credits is AP world history?"

Let's get started!

IB Biology is challenging, college-level biology, so sometimes you will need a little more study help than your class notes provide. In this article, I've compiled the best FREE online IB Biology study guides (including IB Biology Notes and IB Biology Revision) into one resource and provided you with some IB Biology practice questions.

Are you studying for your AP Environmental Science class or the final AP test? Reviewing for any AP exam is tricky, and many students who take AP Enviro aren't sure how they should be studying.

This comprehensive AP Environmental Science study guide will walk you through how you can develop a review plan for AP Enviro, offer study tips, and provide links to notes and practice exams to make your review as effective as possible.

It's often a challenge to study for AP exams, AP Environmental Science included. Because this class covers so many different areas, such as science, law, and current events, it can be tough to keep your notes straight. Whether you're missing some notes or just want them organized more clearly, this guide is for you.

Here, we've put together a list of links to AP Environmental Science notes and vocabulary that you can easily browse through to supplement your studying. I'll also go over how to use these notes and wrap up with some tips to help make your prep as effective as it can be.

Are you taking IB Economics but feel you aren't learning enough from your class alone? Maybe you need more explanation of certain economics topics? If you need some help in your IB Economics SL/HL class, this study guide is for you. I've gathered all of the best free IB Economics study guides and notes into one useful article. This IB Economics study guide is organized according to the IB Economics HL syllabus and IB Economics SL syllabus.

IB Physics HL and SL are difficult courses. Even with the best teacher, you will likely need to spend some time studying on your own to understand the most difficult concepts covered in the course. I remember I did when I took IB Physics HL.

In this study guide, I've compiled links to all of the best free IB Physics study guides so you can easily find notes on the topic you're interested in. I organized this guide using the IB Physics syllabus.

If you're in the IB Business and Management SL/HL class and want a little extra study help for your in-class test or the final IB exam, you've come to the right place. Here, I've gathered the best free online IB Business and Management notes into one convenient place for you.

This IB Business and Management study guide is organized according to the newly-revamped, official SL/HL syllabus.

IB Chemistry may not be quite as easy as this penguin makes it seems. So to help you out, I have compiled the best FREE online IB Chemistry Study Guides and Notes into one helpful article. I've organized this IB Chemistry Study Guide using the order laid out in the IB Chemistry Syllabus.

Full-length practice tests are the best way to get acclimated to the timing and question formats you'll encounter on the AP Human Geography exam. They'll also help you figure out where you need to put in additional study time to improve your scores.

In this article, we'll give you links to all the best practice tests available for AP Human Geography, including full official tests, full unofficial tests, and mini unofficial quizzes that test specific parts of the curriculum.