Appropriate for Grades 7-9 Use this set of 30 laminated cards to divide your class into groups of 2, 3, 4 or 5 students and reinforce scientific facts at the same time! Students form groups based on the scientific themes their cards have in common. As an added benefit, you'll no longer have to remember how students were previously grouped, because each time you use the cards your students will form different groups. Developed by Anthony Jackowski.