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Bowled Over - Isolating Variables: Crash Course Kids #39.1
Try Trials: Crash Course Kids #39.2
A Case of "What-Ifs": Crash Course Kids #29.1
crash course: variables
Isolating variables
Lesson 15 - Isolating One Variable
Defining a Problem: Crash Course Kids #18.1
Designing a Trial: Crash Course Kids #44.1
Scientific Variables
Testing and Trials: Crash Course Kids #44.2
Danger! Falling Objects: Crash Course Kids #32.1
Succeed by Failing: Crash Course Kids #42.1
