Math Workshop offers differentiated instruction to foster a deep understanding of rich, rigorous mathematics that is attainable by all learners. The inquiry-based model provides a menu of multilevel math tasks, within the daily math block, that focus on similar mathematical content. Math Workshop promotes a culture of engagement and individualization that gives mathematical access to every learner in the classroom community. In the way that Readers' Workshop and Writers' Workshop build literacy, a mathematicians' workshop will build numeracy. The model presents an excellent opportunity for students to work on meaningful mathematics and understand the big idea behind the lesson or task--making connections to self, text, another problem, or the world. Math Workshop promotes problem-solving routines that build students' stamina and courage. The model also allows a teacher the flexibility to meet with small groups for instruction that can be differentiated on the basis of students' needs, readiness, or interests. The goal of Math Workshop is to work in the "zone of proximal development," which is the difference between what a learner can do without help and what he or she can do with help (Fisher and Frey 2008). (Contains 1 table and 1 figure.)