An entire lesson in one picture. There's rulers for standard measurements and a few choices of non standard measurement, and a book that explains the concept.

An entire lesson in one picture. There's rulers for standard measurements and a few choices of non standard measurement, and a book that explains the concept.

Provide different nonstandard units of measurement for students to experiment with. Leave the measuring open-ended so that students can freely measure any object they feel are appropriate using the tool.