There are supposed to be 27 children in Harold Boyd IV’s second-grade classroom, but how many of them will be there on a given day is anyone’s guess.

Since school began in September, five new students have arrived and eight children have left. Two transferred out in November. One who started in January was gone in April. A boy showed up for a single day in March, and then never came back. Even now, in the twilight of the school year, new students are still arriving, one as recently as mid-May. At Public School 188, on the Lower East Side of Manhattan, students churn relentlessly in and out. Administrators estimate that nearly half the students enrolled at the school do not last the full year. And how could it be otherwise?(nypost.com)…[+]