This was my go-to review activity. I picked it up at an un-unconference as a student teacher.

First, have students get in groups of four. This is their home group. Have students number themselves from one to four.

Have students move and form groups so that each student in the group has the same number. This is their expert group. Each expert group is responsible for one part of a review assignment, such asÂ this. For example, the 1’s (Adele, Ellen, Lea, and Oprah) may be responsible for becoming experts on solving quadratic equations by factoring, the 2’s on solving using the square root method, the 3’s on solving using the quadratic formula, and the 4’s on the nature of the roots. Emphasize that each member of the group must understand and be able to explain the solution to each question in this part of the assignment.Â I play up that I will only help students while they are in their expert groups.

(Classroom Management Tips: Ask just the first four home groups to move and form their expert groups. Have the remaining home groups remain seated until this is complete. You will be able to see if each student is moving to the correct group. I’ve used this activity in classes of 24 to 32 students. Plan for this. For example, 12 students will form three home groups of three and will move to form four expert groups of three.)

Have students return to their home groups to complete the assignment. If any student needs help with any question, he or she is sitting with an expert. For example,

• Ashton needs help factoring when the leading coefficient is not equal to one?
• Barack has difficulty using the square root method when there are brackets?
• Beyonce struggles with simplifying expressions when using the quadratic formula?
Barack knows.
• Adele canâ€™t remember which condition results in two equal real roots?
Beyonce can help.

I may have gone to the well one too many times with this as a review activity. Time to try Kate Nowak’s speed dating activity. Also, I’d like to use expert groups to have students learn, rather than review, concepts. I’ve used this activity, with some success, to teach exponent laws in Math 9.

A Leibniz-Newton Moment

As I was about to hit publish on this post, Mathy McMatherson published his own post on expert groups. He even mentioned @k8nowak’s speed dating. Please read his post for a more in-depth reflection on expert groups and jigsaw activities in general.

## “Under the Mâ€¦ the square root of 12”

On this blog, sometimes I share my thoughts about transforming math education. This is not one of those times.

Here, I’m using my blog as a digital filing cabinet.

One activity that my students enjoyed was MATHO (and its variations FACTO and TRIGO).

Have students select and place answers from the bottom of each column to fill up their MATHO cards. In some versions, I pulled prepared questions from a hat. In other versions, I translated answers to questions on the fly. For example, if I grabbed 2âˆš3, I called out “Under the Mâ€¦ the square root of 12”. After a student shouts “MATHO!” ask potential winners to read aloud their numbers. (Remember to keep track of answers you have called.)

Nothing revolutionary here â€“ just a fun way to review content.

By the way, if you are looking to read about changing things, please check out Sam Shah’s recent post,Â The Messiness of Trying Something New.