Instructional Video6:11
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Krista King Math

Which Functions Pass the Vertical Line Test?!!

11th - Higher Ed Standards
What is a function? Teachers have been asking pupils this question from the time they started their algebra careers. A helpful video walks through the process of using the vertical line test to determine a function while...
Instructional Video9:01
Khan Academy

The Angle Game, Angles and Intersecting Lines, Geometry

9th - 10th
A motivating activity is coupled with the use of algebra to explore the process of identifying the value of an angle. It feels like magic when Sal shows the solution to the final problem. Also, it would be worthwhile to consider using...
Instructional Video9:02
Khan Academy

The Angle Game, Angles and Intersecting Lines, Geometry

9th - 10th
A motivating activity is coupled with the use of algebra to explore the process of identifying the value of an angle. It feels like magic when Sal shows the solution to the final problem. Also, it would be worthwhile to consider using...