Instructional Video2:05
Curated Video

Tessellations in Maths Explained

3rd - Higher Ed
This video explains what tessellations are, and how to calculate if a shape will tessellate to form a pattern.
Instructional Video
Curated OER

SAT Prep: Test 2 Section 6 Part 4

9th - 12th
Recovering his mathematical fumble from the previous video, Sal readdresses problem 14. He clarifies that his weird answer was from an error in his work, showing students the importance of going back and checking the accuracy of their work.
Instructional Video8:47
Khan Academy

SAT Prep: Test 3 Section 2 Part 1

9th - 12th
Starting a new set of SAT practice problems from The Official SAT Study Guide (page 518), Sal takes students through some straightforward questions involving basic algebra and functions. However, as every math teacher and student knows,...
Instructional Video5:29
Khan Academy

SAT Prep: Test 2 Section 6 Part 6

9th - 12th
The most valuable part of this video isn't math-related (even though the math strategies are quite helpful); it's the way Sal replaces part of a problem that confuses him with easy-to-manipulate variable letters. Students who get hung up...
Instructional Video9:26
Khan Academy

SAT Prep: Test 2 Section 3 Part 3

9th - 12th
Covering geometry, linear equations, and mathematical patterns, Sal discusses problems 9-12 on the practice SAT. His easygoing manner and clever calculations will keep students' interest far longer than reviewing SAT questions from a...