Why this matters
NCES pupil:teacher ratio is enrollment ÷ full-time-equivalent teaching staff. It isn't class size — specialists, resource teachers and coaches pull the ratio down without changing what's happening in a classroom — but a lower ratio generally means more adult attention per student.
What we're seeing
At Achieve Charter School of Chico, the student:teacher ratio has risen 48% over the 5-year window — from 18.8:1 in 2021 to 27.8:1 in 2024. Despite that, the gap vs US average of 15.4:1 has actually widened — from 3.4:1 above in 2021 to 12.4:1 above in 2024.