Paper Slide Videos by Teachers
4 Symbol Range Design - Inequalities

This video was created in Boston this past summer at the Discovery Educator Network Summer Institute.

This is a teaching video on the birthday cake method of factoring numbers.


Mrs. Perry asked her students to create self-portraits at the beginning of the year. She uses these in class charts, her job lists, etc. In this video she is introducing each student.

Videos created at Summer DEN Institute


White Group
Distribute, Combine, Isolate
Change Directions
Divide by a Negative
Greater than
Solve it with a negative
Four symbol range design
Not including five

Green Group
Open Circle
Not including five
Solve it with a negative
Divide by a negative
Change direction

Yellow Group
Open Circle
Divide by a negative
Solve it with a negative
Change direction
Not including five
Greater than
Four Symbol Range Design
Distribute combine isolate