Guess My Rule is an online game created by Sarah Lonberg-Lew & Eric Appleton of the Adult Numeracy Network (you may want to become a member).

The game can be an introduction to functions. What rule is being used to turn an IN number into an OUT number?

Students enter an IN number and the game uses a rule to automatically calculates an Out number. Try different IN numbers to collect information.

Can you figure out the rule?

There are 5 levels of rules, from one step rules to more complicated rules. We recommend starting with Level 1 until your students can confidently figure out the rule.