Does your school have combo/split classes? If so, how're they formed? My school has K/1, 2/3, and 4/5 combo classes. The 4/5 combo class was formed methodically at the end of last school year; however, the K/1 and 2/3 combo classes were formed after the school year started due to an increase in enrollment. Most schools in my district have at least one combo class. Some schools, however, have up to four.