Chegg Prep is an online community-driven library of flashcards, forums, and study guides. Students can use the free version to ask questions (to the community of nearly 7 million users) and sift through suggested flashcards within a particular subject or topic.

Quizlet allows users to create their own quizzes, flashcards, diagrams, and games to design their own fun, interactive learning experience. Students can also search through more than 250 million study sets and take the material with them wherever they go on mobile devices.

Duolingo lessons adapt to your learning style. Exercises are tailored to help you learn and review vocabulary effectively. A study has shown that 34 hours of Duolingo are equal to 1 university semester of language courses.

Desmos is a free online graphing calculator that students can use to graph functions, plot data, and evaluate equations. The site and mobile app are both extremely user-friendly and include valuable guides and resources to help students get the most of the calculator. It’s also very simple to print, export, and share the graphs and solutions students create.

Khan Academy is a completely free personalized learning resource with an online library of more than 3,000 courses, videos, and exercises. Also available as a mobile app, Khan Academy offers lessons in math, science, and history. The platform also allows students to complete daily reviews and track their progress.

Cold Turkey helps students stay focused on blocking applications and websites for a set amount of time. There’s also a mobile version that does the same thing for phones—making students quit all their distractions, cold turkey.

Studies have shown that the Pomodoro Technique—a focus strategy that involves timed combinations of concentration and short breaks—can help students stay focused on a particular task. Focus Booster gives them the tools to implement this study technique and develop a deeper understanding of their work habits.

Evernote gives students the ability to take notes however they want and organize it all in one place online. They can type out their notes, take a photo, create checklists, record audio, forward emails, and even write notes by hand onto a screen (for devices with that capability). Once it’s on Evernote, students can search and organize their notes using notebooks, categories, and tags.

This is a platform that provides high quality curated STEM content for teachers and students. Its library has over 5000 math and science materials ideal to use in class.

EdX offers free online courses from world’s top universities including ‘Harvard University, MIT, UC Berkeley, Tsinghua University, Microsoft, Linux, The Smithsonian and more. Courses cover different topics like computer science, engineering, history, psychology, nutrition, big data, statistics and hundreds more.’

Access thousands of primary sources — letters, photographs, speeches, posters, maps, videos, and other document types — spanning the course of American history