sentences:  Abbe Boring, the principal of Cunningham in 1992, said that the student population increased when formerly singles-only apartments were required to allow families to rent complexes.In September 1991 Braeburn and Cunningham were two of 32 HISD schools that had capped enrollments; in other words, the schools were filled to capacity and excess students had to attend other schools.By 1992, Cunningham had around 1,200 students and 51 temporary classroom units.