Students work to identify the discriminant of a quadratic equation then collaborate with other students to check their work and check for errors.
Resource includes 4 different worksheets, each identified with a symbol. Students work in home groups to calculate the discriminat of their quadratic equations. I use a timer to keep students on task, and when timer goes off, students break up into groups in each of the 4 corners with students of same worksheet to discuss problems, compare answers and check for errors. When time is up, students return to their home groups.
This is a kagan strategy which works great to increase discourse in the math classroom.