I have a small class of 6 in an alternative math class with all different math backgrounds. We are doing Estimation 180 each day. I let the one student come up and play teacher to lead the discussion and enter the answers into the computer. I am enjoying watching them.
Next, we did cheesemonkey's number bootcamp here: Bootcamp game. It is a board game. I used a coin to flip for heads to be positive and tails to be negative, then a dice to tell them how many spaces to go, a numberline as the board, and cards with problems. I thought it might have too many parts but they did great. And, I learned that they are better with negative numbers than I thought. Some good feedback.
In Accelerated Algebra 2, I am continuing with the activities. I introduced piecewise functions. First with a cut and paste Piecewise Investigation (sorry, I borrowed it, but can't remember from whom). And, then we did an Around the World Piecewise thing with the kids given a piecewise function, then find its matching graph. The kids were up and moving and answering each other's questions. It was a fun Friday activity.