Musical Fact Families is a fun and engaging way to ensure students' understanding of building fact family number sentences! This product contains two different work mats and 45 triangle cards, each with a different fact family. Using the house-shaped work mat allows students to visualize the three numbers as a family and then build four number sentences to fill up the rooms of the house. Use this product as a game for the whole class OR at a math center/station. Instructions for both are included!