Click the green flag and watch for a prompt to enter your number at the bottom of the screen.
This project, based on an activity from csunplugged.org, teaches the binary number system. My students have 5 "dot cards", one each with 1, 2, 4, 8, and 16 dots. They try to figure out which ones to combine to add up to a certain number. For example, for the number 22, they need the 16, the 4, and the 2. (This "Dot Cards" program has Scratch Cat showing the dot cards needed for any number up to 31.) We go from there to discussing the binary number system. Since the number 22 needs 1 16-dot card, 0 8-dot cards, 1 4-dot card, 1 2-dot card, and 0 1-dot cards, it is written in binary as 10110. If you use this project, I wish you fun and success!
