This set includes 2 lesson plans, a discovery activity, a divisibility rules cheat sheet, task cards and a note catcher for a game of quiz-quiz trade. In the lesson plan, students will investigate which numbers are divisible by 2,3 and 6. They will then look for patterns. Students continue to make more discoveries along the way until the rules for 2, 3, 4, 5, 6, 8, 9 and 10 are discussed. Students will get practice with the task cards as they use the protocol "quiz-quiz trade" to quiz classmates and become the teacher. I teach this lesson over two class periods.