A classroom activity that involves students of year 3/ level about encoding and decoding data is using the mini mystery activities.

These fun worksheets are where students need to read clues to solve the mystery. It can be used as a whole class activity or individual

IT requires students to use logic and reasoning to remove the incorrect answer in this example the keys, and requires theme to source their knowledge or research knowledge about 2d shapes and right angles to get the correct answer.

From https://www.teachstarter.com