Common Core Collaborative Cards Base 10 And Algebraic Thinking Set Of 2 The Algebraic Thinking is Brand New. The Base 10 set shows very little use. The Set of 2 Common Core Collaborative Cards from Didax focuses on math concepts such as base 10 and algebraic thinking. These educational cards are designed to promote collaborative learning and are perfect for teachers looking to engage their students in hands-on math activities. The cards cover essential math themes and are ideal for schools or homeschooling environments where math education is a priority. #commoncore #math #Algebra #Teachers #Homeschool