A transition activity I have useful in both 2nd & 4th grades is Silent Math. During the times your entire class is lined up and waiting, have one child start by using fingers and hand signals to give math problems. (Example: Hold up one finger (1), then make a plus sign (+), then two fingers (1+2). Lastly, put one hand above the other facing in opposite directions for the equal sign(=).) If a student wants to answer, he/she must raise their hand to be called on. They must give the answer using fingers and hand signals. The kids love it and it keeps the noise level down!