If you are looking for a resource to help mathematics students complete homework assignments and learn outside of the classroom, you may want to check out Math Planet, an easily navigable online resource for mathematics students and instructors. Designed specifically for American high school students, the majority of Math Planet functions like an online textbook. Users can browse through subjects (Pre-Algebra, Algebra 1, Algebra 2, and Geometry) and select specific topics (e.g. linear equations, quadrilaterals, complex numbers) within these subjects. Each topic is accompanied by a written explanation of key concepts and a short Video Lesson that models how to do related math problems. In addition, Math Planet includes 60 ACT practice questions and 70 SAT practice questions. After attempting to solve these questions, visitors then learn the answers and may watch a video explanation.