Mary B. Lewis Elementary

Mary B. Lewis Elementary is a primary school of medium-sized scale in Bloomington, California, operated by Colton Joint Unified, serveing 548 students in grades K through 6.

Colton Joint Unified comprises 27 schools with combined enrollment of 18,397 students; Mary B. Lewis Elementary is among them.

Looking at the student body, Mary B. Lewis Elementary lists that 87% of students identify as Hispanic, making the school strongly Hispanic-majority. Beyond that, the school lists 7% Black, 4% White. The wider county runs roughly 55% Hispanic, putting the school's mix meaningfully more Hispanic than the area baseline.

On the resource side, Mary B. Lewis Elementary logs 24 full-time-equivalent teachers, putting the student-to-teacher ratio at about 22.8:1. The state averages about 22.3:1, putting this campus right in line with peers. About 93% of enrolled students meet the income threshold for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. Set against San Bernardino County (around 74%), the school's rate is meaningfully above typical.

Adjusting for the school's free-and-reduced-lunch share, Mary B. Lewis Elementary performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 24.1%, the actual is 24.8%, a residual of +0.7 points.

Zooming out to the county, the surrounding county (San Bernardino County) logs that the typical household earns roughly $85,478 per year, roughly 23% of adults have completed at least a four-year degree, and the poverty rate sits near 11%. Mary B. Lewis Elementary is one of 583 public schools in San Bernardino County (combined enrollment of about 393,648 students).

Nearest neighbor: Gerald A. Smith Elementary, around 0.6 miles off. Within five miles, there are 8 other public schools. Among the 7 schools in that immediate cluster with test data (this one included), Mary B. Lewis Elementary ranks 7th on composite proficiency, beneath the local average of 31.2%.

The school occupies a commuter-belt site.

Looking at the recent track record. Over the past 7-year window, the student count contracted 21%: 694 students in 2018 compared to 548 in 2025. The student-to-teacher ratio tightened from 24.8:1 in 2018 to 22.8:1 today.

On allk12, posts here usually surface around science fair prep, picture-day reminders, and bus-route questions. Anyone with firsthand experience at this school can post or comment.