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Categories:  Student Use, Teacher Use, Tutorials, Assessment Brief Description:  Their current solutions target the high-school age curriculum, including Math, Science, SAT, ACT and AP subjects.  Some of our products are free, and some are paid. For instance, Brightstorm Math and Brightstorm Science videos are free-these 2,500+ videos cover every topic in Algebra 1, Geometry, Algebra 2, Precalculus, Trigonometry, Calculus, Biology, Chemistry and Physics. Our paid products include great tools like Math Homework Checker and test preparation programs for the SAT, the ACT and several AP courses. Great teaching forms the core of these comprehensive programs, which also include practice quizzes, downloadable materials, full-length practice exams and more.

Find thousands of free AP, SAT and K-12 questions from trusted sources, including Kaplan. Students--Practice questions online with immediate feedback. Educators--Create, share and modify questions on any topic with ease

Sometimes you don't understand your teacher, your textbooks make no sense, and you have to read sixteen chapters by tomorrow. SparkNotes is a resource you can turn to when you're confuzzled. We help you understand books, write papers, and study for tests. We're clear and concise, but we never leave out important info. As SparkNotes editors, our mission is to help you make sense of confusing schoolwork. We are well qualified to lend a hand: we're graduates of top schools, we have advanced degrees galore, we've taught undergraduate and graduate classes, and we've edited books on Shakespeare, The Scarlet Letter, and the SAT (and that's just the S's!). We work with experts to create books, blogs, quizzes, and flashcards that will help you master hard material.