This bundle provides you with interactive slides, hands on activities, center activities, and assessments to teach and reinforce fluency within 20. Students will get practice with teen numbers, finding making a ten to add, sums to 20, solving equations with 3 addends, making a ten to subtract, finding missing addends, and solving word problems.Lessons are designed with scaffolding in mind so all students can access the lessons. Topics and activities are broken down and build upon each other so s