Transitional kindergarten for all 4-year-olds has been touted ... but districts could enroll younger children if they had room and met stricter rules: a 1:10 adult-child ratio and a maximum class size ...

About 7:45 a.m. the 4-year-olds in Lourdes Serrano’s transitional kindergarten class realized they would ... Learning the rules of going to the bathroom. Run your hands under water, then soap ...