I will first start off by explaining what addtion and subtraction are. I will explain that addition is adding things together to form a group. Subtraction is taking things away. I will model addition and subtraction by using blocks. After I model with the blocks a few times, I will demonstrate a property and call on the students to say whether I am doing addition or subtraction.
I will give each student a different number of blocks. I will then ask them to pair up with a partner that has the appropriate amount of blocks to equal the number I call out. For subtraction, I will ask them to find the person with the number of blocks they need to take away to get the answer.
I will model for the students a word problem, using circles or squares to represent the numbers. I will draw a certain number plus or minus a certain number is an answer. I will ask them to identify whether I am using addition or subtraction.
To evaluate the students, I will give them a worksheet using the activity I modeled earlier and ask them to identify whether addition or subtraction is being used.
If we are not able to do the worksheet, I will write the problems on the board and get them to answer them.