Standards:
Number Sense 3.0: Students solve problems involving addition, subtraction, multiplication, and division of whole numbers and understand the relationships among the operations.
Mathematical Reasoning 2.1: Use estimation to verify the reasonableness of calculated results.

Objective:
To review and reinforce the mathematics practice done to date (addition, subtraction, multiplication, estimation).

Anticipatory Set:
The teacher will group students into two teams. They will have two minutes to collaborate on a team name.
Conduct: Follow directions of the game; support your teammates; listen to all questions and answers; only the student at bat can answer the question. If a student misbehaves, they can be sent to the dugout and will miss a turn (and get an out if their number comes up in batting order).
Transfer: The teacher will pass out numbered cards for the batting order.
Purpose: To review the mathematics we have done so far in class before moving on to division.
Motivation: If everybody is supportive of one another and the game is successful, we can play a real game for PE next week (kickball).

Learning Activity:
Summary: Students are divided into teams and score points by moving around the bases and answering questions.
1. Teacher draws a baseball diamond on the board.
2. Questions are on cards divided into three stacks according to difficulty (easy, hard, hardest).
3. Teacher asks student at bat if they prefer a single (easy), double (hard), or homerun (hardest) question. Teacher asks question, and if student is correct, player advances and the next student goes to bat. A question will be read only once; it is the student’s responsibility to pay attention and write down the problem on scratch paper.
4. While not at bat, the alternate team may provide a correct answer (if the student at bat misses) for a double play/double out.
5. Three outs and the opponents are up to bat.

Differentiated Instruction:
Students can choose from three levels of questions: easy, hard, and hardest. Students will be given an unspecified time limit (30 seconds to a minute). The teacher will determine when time should be up based on knowledge of the student’s abilities.

Assessment:
Based on teacher observation. How well did the students answer the review questions? How much time did they need to solve the problems? What type of problems, if any, did students struggle with?

Closure:
Ask students what strategies they used in the game to help them solve the problems (for example, rounding in estimation).