This abuse proved to be a catalyst for anti-arena faculty in the school. Five of six department chairs and dozens of teachers at Lowell filed a union grievance demanding an end to class imbalances. Citing these imbalances, they called to eliminate arena scheduling and to replace it with computerized scheduling used in all other SFUSD schools. Critics characterized arena scheduling as an antiquated and inefficient system, one which promotes inequities and abuses, and creates weeks of unnecessary work for teachers and counselors (the system tends to produce "incomplete" schedules which must be dealt with after the scheduling period).