1ST GRADE ADD TWO-DIGIT NUMBERS FLIP BOOK iREADY® MATH UNIT 5 LESSON 21 FUN ACTIVITY CRAFT / MATH JOURNAL This Flip Book Project is a great companion for iReady® Math.This project is a great addition to any Math Curriculum for First Grade. It offers your students extensive practice with practicing how to: o Apply and extend previously learned models and addition strategies to add two-digit numbers. o Understand that to add two-digit numbers, you can add the tens with tens and the ones with ones