Cobblestone Elementary, Rocklin CA

Original Research by School Decision on Cobblestone Elementary

Cobblestone Elementary serves kindergarten through sixth grade in Rocklin, a suburban city in the Sierra Nevada foothills about twenty miles northeast of Sacramento. The school is part of Rocklin Unified, a district of seventeen schools that has been actively investing in facilities and expanding program offerings as the community grows.

The school's academic performance shows solid proficiency in math across the grades tested, with roughly two-thirds of students meeting or exceeding proficiency on the state assessment. English language arts performance is somewhat lower, with proficiency rates varying by grade, including a notable dip in third grade. Science proficiency at the fifth-grade level, the only grade tested, sits near a fifty-fifty mark. Overall, Cobblestone's combined proficiency across all tested subjects and grades places it in the top quartile among schools in Placer County, a meaningful position for an elementary school in its peer group.

The student body reflects the broader Rocklin suburban mix: a white majority, a substantial Hispanic population, and smaller Asian and multiracial cohorts. About a third of students qualify for free or reduced-price lunch, suggesting a mixed-income enrollment typical of suburban commuter communities near Sacramento. The school enrolls roughly four hundred students, with sixth grade as the largest cohort; kindergarten is notably smaller, which may reflect either a younger grade structure in the building or broader enrollment patterns in the area.

Rocklin itself has transitioned from its industrial past as a granite and railroad center into a residential and commercial hub where major employment spans education, technology services, and retail. Housing values are moderate for a suburb in the Sacramento region, and the median household income is solid. The area is experiencing rapid population growth, which creates steady demand for school enrollment but also infrastructure pressures the district is addressing through a proposed facilities bond planned for the November ballot.

The district has expanded curriculum offerings notably in recent years. It launched its first dual language Spanish immersion program at another school and continues to offer that pathway through high school for families seeking bilingual education. The district also changed its board election structure from at-large to trustee-area voting, a governance shift that alters how different neighborhoods are represented and weighted in school board decisions.

A parent considering Cobblestone would be looking at an elementary school with solid math performance, moderate English language arts results, and an enrollment that mirrors the suburban character of Rocklin. The school sits in a district investing in aging facility upgrades and deliberately expanding program diversity, which suggests a community planning for sustained enrollment and evolving family needs. The top-quartile proficiency standing is a genuine strength. A parent may want to look into the school's approach to English language arts, particularly at the lower grades, and discuss with the school any strategies underway to build proficiency in that area.

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Academic performance

How students perform on state tests, by grade, set against the district.

Math

Grade 371%

School 71% · District 68% · ▲ 3 pts above district

▲ 28 pts above state median · ▲ 10 pts above county median

Grade 461%

School 61% · District 65% · ▼ 4 pts below district

▲ 23 pts above state median · ▲ 3 pts above county median

Grade 571%

School 71% · District 60% · ▲ 11 pts above district

▲ 41 pts above state median · ▲ 24 pts above county median

Grade 666%

School 66% · District 63% · ▲ 3 pts above district

▲ 36 pts above state median · ▲ 14 pts above county median

English language arts

Grade 356%

School 56% · District 60% · ▼ 4 pts below district

▲ 16 pts above state median · even with county median

Grade 461%

School 61% · District 63% · ▼ 2 pts below district

▲ 19 pts above state median · ▲ 1 pts above county median

Grade 575%

School 75% · District 65% · ▲ 10 pts above district

▲ 30 pts above state median · ▲ 17 pts above county median

Grade 670%

School 70% · District 69% · ▲ 1 pts above district

▲ 26 pts above state median · ▲ 6 pts above county median

Science

Grade 551%

School 51% · District 46% · ▲ 5 pts above district

▲ 23 pts above state median · ▲ 5 pts above county median

This schoolRocklin Unified, same grade

Graduation rate (ACGR) reflects the federally published Adjusted Cohort Graduation Rate for the most recent year available. We refresh this data annually at the close of each academic year in June. The federal source publishes a banded rate (for example, "90-94%") instead of an exact number for cohorts small enough to risk identifying individual students. The state distribution chart, where shown, plots every school in the state with a published rate or band; schools whose rate is federally suppressed are excluded. Where the federal source publishes a band rather than an exact rate, the school is placed within its band using a stable, ID-derived offset, so its position is consistent across visits.

Proficiency by household income

English language arts

Grade 3Lower-income45%Higher-income61%16 pp gap

Grade 4Lower-income56%Higher-income64%7 pp gap

Grade 5Lower-income71%Higher-income77%7 pp gap

Grade 6Lower-income60%Higher-income75%15 pp gap

Mathematics

Grade 3Lower-income50%Higher-income80%30 pp gap

Grade 4Lower-income50%Higher-income67%17 pp gap

Grade 5Lower-income39%Higher-income88%49 pp gap

Grade 6Lower-income50%Higher-income75%25 pp gap