Overview: For students, a successful experience with math begins with the basics: how to think like an active mathematician, how to speak mathematically, and how to record and share their thinking. This guide is intended for grades 3-5 but can be used for K-2 with modifications, and may be extended, condensed, or modified according to students’ needs. As you prepare to implement the 20 Day Math Program during the 60 minutes of math instruction, keep in mind that it will be necessary to be flexible. These 5-15 minute lessons are to be incorporated into the daily lesson. Some days are entire lessons in and of themselves. Clear statements and clear demonstrations of roles and procedures need to be established. All points and aspects need to be repeated, charts or anchors of support are to be posted and referred to again and again.