2nd Grade Units (Based upon Oregon Common Core Standards for Mathematics): Operations and Algebraic Thinking Represent and solve problems involving addition and subtraction. Add and subtract within 20. Tic Math Toe - Game. Shot Clock - Game. Spot Kicker - Game. Work with equal groups of objects to gain foundations for multiplication. Number and Operations in Base Ten Understand place value. Jet Tank - Game. Use place value understanding and properties of operations to add and subtract. Measurement and Data Measure and estimate lengths in standard units. Relate addition and subtraction to length. Work with time and money. Time Teller - Game. Coin$ for Candy - Game. Represent and interpret data. Geometry Reason with shapes and their attributes. 3rd Grade Units (Based upon Oregon Common Core Standards for Mathematics): Operations and Algebraic Thinking Represent and solve problems involving multiplication and division. Understand properties of multiplication and the relationship between multiplication and division. Skip Counting Step-by-Step Zombie Paintball - Skip Counting Game. The Battle of Factors - Factors Game. Multiply and divide within 100. Tic Math Toe - Game. Shot Clock - Game. Spot Kicker - Game. Hammer Multiplication - Game. Solve problems involving the four operations, and identify and explain patterns in arithmetic. Number and Operations in Base Ten Use place value understanding and properties of operations to perform multi-digit arithmetic. Number and Operations - Fractions Develop understanding of fractions as numbers. Pearl Diver - Game. Battleship Numberline - Game. Jet Reduction - Game. Measurement and Data Solve problems involving measurement and estimation of intervals of time, liquid volumes, and masses of objects. Represent and interpret data. Geometric measurement: understand concepts of area and relate area to multiplication and to addition. Geometric measurement: recognize perimeter as an attribute of plane figures and distinguish between linear and area measures. Geometry Reason with shapes and their attributes.