This document provides 20 fun math activities for the classroom, including reading math-focused storybooks, creating mnemonic devices, using daily math starters, and playing educational math games like Prodigy. Some key activities mentioned are having students make up rhymes and stories to help remember math facts, finding age-appropriate math books that present skills through narratives, and using the free Prodigy platform which adapts problems based on individual students' abilities. The document recommends introducing engaging math activities to help keep students interested and performing better.