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Curated Video
Tessellations in Maths Explained
This video explains what tessellations are, and how to calculate if a shape will tessellate to form a pattern.
Curated OER
SAT Prep: Test 2 Section 6 Part 4
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.
Khan Academy
SAT Prep: Test 3 Section 2 Part 1
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,...
Khan Academy
SAT Prep: Test 2 Section 6 Part 6
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...
Khan Academy
SAT Prep: Test 2 Section 3 Part 3
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...