Below is an easy to use Random Group / Team Maker with no ads for the classroom. Are you having difficulty making teams or groups in your school? why not let the RNG gods decide for you. Do it in front of the students for the best results. Other useful tools on this site are
Top box = Group size Bottom box = variable ( Name, Number etc ) separated by a comma like below. 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40