Unit 1 *Investigation 1: Math Tools & Routines Counting, Counting Pennies, Telling Time to hour *Investigation 2: Order Property of Addition Addition Facts, Adding Multiple Numbers, Subtraction Facts *Investigation 3: Comparing Quantities and Counting by Groups Enough for the Class problems; Subtract Facts; Counting pennies, nickels, dimes; Skip Counting by 2, 5, 10 *Investigation 4: Solving Addition and Subtraction Story Problems using Various Strategies