Algebra classes walked into the room today with this on the back whiteboards.
The only direction I gave was for them to sort them. For some periods this took thirty minutes, for others it took five. They eventually broke them down by degree and sorted them. Then cleared off the board and sorted them again by number of terms.
Even though this took quite a bit of time, the movement and discussions were an infinite number of times better than the front and back worksheet I had originally planned for today.