Origami Frogs

Trace the links between a variety of math concepts in this far-reaching unit. Ideas that seem very different on the outset (like the distance formula and rigid transformations) come together in very natural and logical ways. This...

Students compare two lengths using the area of a square. In this geometry lesson, students solve problems using ratio and proportion of the two shapes. They solve equations by taking the square root of both sides.

Time to learn about sundials. Scholars see how to build sundials after learning about Earth's rotation and its relation to time. The unit describes several different types of possible sundials, so choose the one that fits your needs — or...

The purpose of this task is to explore reflections in the context of paper folding. Each fold is associated with a line of reflection and understanding each step in the construction requires careful analysis of angles and of the...

The goal of this task is to apply knowledge about similar triangles in order to understand an origami construction: trisection of the side of a square. Aligns with G-SRT.B.5.

Students explore the concept of origami. In this origami lesson, students construct picture frames out of paper. Students find the midpoint of the paper and determine the fractional area of the paper as it is folded.

After successive folds of a piece of origami paper, a student must explain why the shape made is a regular octagon. Aligns with G-CO.A.3 and G-CO.D.12.

Video demonstrating how to prove the Pythagorean theorem by folding squares of paper. [3:14]

In this online, interactive worksheet (7), students complete ten problems in 12 minutes to help prepare then to take the SATs. The problems vary in difficulty and content.