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Castle Rock Elementary School

Public School | Grades K-5 | Walnut Valley Unified
2975 Castle Rock Rd
Diamond Bar, CA 91765
(909) 598-5006

About This School

Castle Rock Elementary School is located in Diamond Bar, CA and is one of 9 elementary schools in Walnut Valley Unified School District. It is a public school that serves 512 students in grades K-5. See Castle Rock Elementary School's test results to learn more about school performance.

A school's Academic Performance Index (API) is a scale that ranges from 200 to 1000 and is calculated from the school's performance in the Standardized Testing and Reporting (STAR) Program. The state has set 800 as the API target for all schools to meet.

Castle Rock Elementary School had an API growth score of 925 in 2012. California uses the Academic Performance Index (API) to measure annual school performance and year-to-year improvement. Castle Rock Elementary School's 2012 base score was 933, however the school did meet its 2012 school-wide growth target.

In 2010, Castle Rock Elementary School had 23 students for every full-time equivalent teacher. The California average is 24 students per full-time equivalent teacher.

Student Ethnicity (2011)

Students (2011)


Students Per Teacher (2010)

Female/Male (2011)

52% 48%

Subsidized Lunch (2011)


District Spending (2010)

per student
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