Do you have fast finishers? Or students who finish their morning work faster than others? That's where you can use Crack the Number Code!
At the beginning of the year, I have students make up their own secret messages. Then, once a week, I post them on my board. All students are given a copy of the code so when they want they can work on cracking the code. At the end of the week, all students who figured it out correctly earn a prize. Sometimes it is a sticker, homework pass or other coupon I have on hand.
Once I have used all of the messages, I take a few minutes to have students come up with new messages. My students love this and I know yours will too!