1. Get your class into groups of three. I always do this on a random basis. Let's say you had 26 people in your class. Take 26 kids divided by 3 and you get 8 full groups of three. Count students one, two, three, and so on till eight, then start back at one, two, three and keep doing this until you run out of people. In this case, you will have 6 groups that have 3 in it and 2 groups that have 4 in it. Now the ones get together and the twos get together and so on.
2. Hand out a problem set A in paper form to each group. This will have three problems in it. A1, A2, and A3. Each student will work on a different problem. The group will then add the sum of all three answers.
3. When a group thinks it has a sum, they bring up THEIR PAPER to show you their answer. Don't have the students SAY the sum. This might give it away for the other students. If they are correct, give them the problem set B in paper form. If they are incorrect, then they must go back and find out where they made a mistake.
4. I have my students do all their work on a separate piece of paper to be turned in. This creates a little accountability as well as a place for them to work.
5. You will have to decide how many sets of problems you will want. I typically have 3 to 4 sets. I have the last set as extra difficult.
Here are a couple of examples of the "Sum of Three" activity.
|This is a problem set for multiplying fractions in Intro to Algebra|
|This is the answer sheet that I use when the students come up to give me their SUM.|
|This is an Algebra "Sum of Three" problem set. I have the students add the y-intercepts of the line.|
PDF of the FRACTIONS "SUM OF THREE" ACTIVITY
PDF of the EQUATION OF A LINE "SUM OF THREE" ACTIVITY