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### Diagonals to Quadrilaterals

### Handshakes

When the nine justices of the Supreme Court meet, they greet one another with a handshake to show harmony of purpose, even though their views may differ. How many handshakes occur? In general, how many handshakes occur when there are n people?

### Bunny Times

Become confident in facts up to 12 x 12 using visual models that stress the conceptual aspects of multiplication.

### Geogebra: Residuals and Linear Regression

### Using an Elevator to Evaluate Signed Number Expressions

Using an Elevator to Evaluate Signed Number Expressions Using the idea of an elevator moving up and down, students will be given a small set of rules to add and subtract signed integers. The idea behind the method of adding and subtracting signed integers offered in these lesson is that the number of rules that s

### Can You KenKen?

### Geogebra:Dynagraphs

Explore relationships between inputs and outputs by manipulating interactive double number lines.

**This interactive is optimized for your desktop and tablet. **