Khan Academy (Youtube): You may probably know Salman Khan from his YouTube videos, in which he speaks with a soothing voice as he helps everything make sense. He covers a diverse array of subjects from art chemistry, psychology to biology. However, in addition to his wonderful YouTube videos, he also has a beautiful website, where you can watch informative videos and practice the skills you’ve learned.
SparkNotes: this site offers more than just literature explanations; it gives answers to basically every subject you will ever encounter at school. All the information is organized, succinct, and comprehensible. If you prefer reading the information over watching videos, it will be better to use SparkNotes rather than Khan Academy.
Crash Course: As a visual learner, I cried of happiness when I found Crash Course. If you don’t know Crash Course, it is created by the famous vlogbrothers, John and Hank Green (yes! It is the John Green who wrote The Fault in Our Stars!). Their mini lectures on history (U.S., World), literature, and science (biology, ecology, chemistry) are literally crash courses on everything you learn in class, condensed in short 10 minute videos, filled with many colorful animations. It’s a great resource to utilize because it makes learning a lot more interesting.
Open Yale Courses: Another awesome site suggested by Elizabeth, Open Yale Courses provide online introductory college courses for a variety of subjects. The website is easy to navigate through and all the lectures for a course are labeled according to topic and posted on YouTube. In addition to that, the course materials that come along with the course are provided.
Educreations: This is a great educational website that my precalculus teacher uses a lot with us. You can search for a particular concept, and a video will pop up if someone created a video lesson regarding that concept. It’s even available on the app store!
Purdue Owl: It is an awesome go-to guide for writing. Everything is organized neatly, and it provides so many great tips on the different steps when it comes to writing. It also has help for writing different things such as poetry and fiction. In addition, if you don’t want to go the EasyBib way or are forced to MLA or APA format everything yourself, Purdue Owl has a very comprehensive guide to everything MLA or APA related (even how to cite a tweet in MLA format!)
ScienceDaily: This is basically the science version of NY Times. It’s great for researching different topics and definitely a go to resource for science related research papers or projects.
chemistNATE: Like PatrickJMT, chemistNATE, explains everything slowly and clearly. He writes everything down on the piece of paper and explains all his workings along the way. He is a great resource to use if you like how everything is done step by step. Although he mostly goes over AP Chemistry concepts, it doesn’t mean non-AP students shouldn’t go and check him out!
Crash Course Chemistry: This is the Crash Course created by vlogbrothers that I mentioned above. Like I said, it is a great resource to use for visual learners. Hank also uses real life examples, which I find really helpful because it helps me understand why I need to know the concept. However, this may probably be more suitable for beginner chemistry students (AP students should still use it because it is still a great source for revision!).
Bozeman Biology: Mr. Anderson is a god to all AP Biology students. His explanations are easy to comprehend and they clear up a lot of confusion. Besides biology concepts, he also explains labs and math concepts (ex. Chi square) that biology students need to be able understand and use. He even explains the main points of the AP Biology course that College Board wants all AP Biology students to know and provides great examples for them.
MIT Fundamentals of Biology: MIT provides awesome lectures to introductory biology that all biology students can use. It may contain more information than you need to know, but it is comprehensive and it provides clear explanations in the topics and experiments you will go over in class. In addition to biology, MIT also posted up a plethora of other lectures from a variety of classes that would be great to check out as well.
Crash Course Biology/Crash Course Ecology: Like Crash Course Chemistry, these two series provide amazing visuals, but do not go into as much depth as AP students would like (still an awesome resource for revision!). It’s better for those of you taking introductory biology courses.