For life in the 21st century, mathematics proficiency is as fundamental as literacy, and the keystone of mathematical proficiency is Algebra 1. Traditionally, algebra has distinguished the college-bound from other students. Today it denies many students a high school diploma and contributes to dropout rates. The challenge for K-12 schools is to prepare students for success in Algebra 1 and beyond by teaching algebraic thinking at all grade levels. This workshop focuses on ways to meet and beat the Algebra Challenge using strategies that engage students in a challenging, rigorous, thinking curriculum.