Chaparral Middle

Chaparral Middle, a big middle school in Diamond Bar, California, one of the schools within Walnut Valley Unified, serves 1,349 students, covering grades 6 through 8. By comparison, California's public schools average about 659 students each, so Chaparral Middle sits 105% bigger than that benchmark.

Within Walnut Valley Unified, which oversees 15 schools and 13,992 students, Chaparral Middle is one campus in the system.

On demographics, Chaparral Middle shows that 77% of the student body identifies as Asian. Other groups include 14% Hispanic, 4% White, 3% multiracial. The wider county runs roughly 15% Asian, putting the school's mix visibly more Asian than the area baseline.

On the income-and-resources front, Staff filings list 48 full-time-equivalent teachers, which works out to roughly 28.3:1 students per teacher. Statewide, the average ratio sits near 20.7:1, putting Chaparral Middle higher than the state norm the norm. Around 25% of the student body qualifies for free or reduced-price meals, which schools and policymakers use as a rough income-mix signal. Set against Los Angeles County (around 70%), the school's rate is noticeably below typical.

On a demographically-adjusted basis, Chaparral Middle is in the OUTPERFORMING tier of the BeatsExpectations model, which fits a per-state line through proficiency and FRL share. Schools with this campus's poverty mix typically land near 64.8%; this one delivers 80.8%, a residual of +16.0 points.

In the area at large, the surrounding county (Los Angeles County) shows that median household income runs about $90,112, roughly 36% of adults have completed at least a four-year degree, and roughly 10% of residents live below the federal poverty line. In all, Los Angeles County runs 2244 public schools (combined enrollment of about 1,265,907 students), of which Chaparral Middle is one.

Nearest neighbor: Maple Hill Elementary, around 0.4 miles off. Counting just inside five miles, 8 other public schools cluster around Chaparral Middle. Ranking that nearby cluster on reported proficiency puts Chaparral Middle at 4th of 9; the average score across the group is 69.3%.

Geographically, the school is in a bedroom-community area.

Over the past 7-year window. Over the past 7-year window, the student count grew 9%: 1,240 students in 2018 compared to 1,349 in 2025. Asian enrollment moved from 65% to 77% across the same window. Class-load math has widened: from 26.7:1 in 2018 to 28.3:1 in 2025.

On allk12, posts here usually surface around enrollment questions, classroom assignments, and PTA news. Parents, students, alumni, and staff are welcome to weigh in.