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### 5.4 Accessing and Investigating Data Using the World Wide Web

3-5

Use census data available on the Web to examine questions about population.### Area of Triangles

3-5, 6-8

To find the area of a triangle, try to make a parallelogram using a copy of the triangle.

### Handshakes

3-5, 6-8

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

Pre-K-2, 3-5

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

### Can You KenKen?

3-5, 6-8

The objective of this lesson is to use combinations to solve KenKen puzzles. An early solution strategy is for students to guess and check and use logic-based elimination. This lesson builds on those strategies by having students systematically list all possible combinations within each cage, the darkly outlined sections of the puzzle.