This site has more than 1,500 videos illustrating how to solve math problems for students in grades 6-12. Topics include 6th-8th grade math, pre-algebra, algebra 1 and 2, geometry, and Texas digits skills and standards. Topics can also be viewed by common core standards, SAT, and ACT.
Each topic is broken down to specific focus concepts, such has how to calculate the midpoint of a line segment between two coordinates. So the search feature is very helpful to students struggling with a specific math skill.