Is Castle Rock Elementary a good school?

Castle Rock Elementary ranks 790 th of 5862 California elementary schools. SchoolDigger rates this school 4 stars out of 5.

How many students attend Castle Rock Elementary?

In the 2023-24 school year, 691 students attended Castle Rock Elementary.

What is the racial makeup of Castle Rock Elementary?

Students at Castle Rock Elementary are 70% Asian, 19% Hispanic, 6% Two or more races, 4% White, 1% African American.

What schools do graduates of Castle Rock Elementary attend?

Students who attend Castle Rock Elementary usually go on to attend: Middle : South Pointe Middle High : Diamond Bar High

Castle Rock Elementary

Summary:

Castle Rock Elementary is a public elementary school located in Diamond Bar, California, serving 646 students in grades K-5. It is part of the Walnut Valley Unified School District, which is ranked 69 out of 1,568 districts in the state and has a 5-star rating from SchoolDigger.

Castle Rock Elementary consistently performs above the state average in Smarter Balanced Assessments for English Language Arts and Mathematics, with proficiency rates of 67.73% and 67.6%, respectively, compared to the state averages of 47.04% and 35.54%. The school's performance in Science (CAST) is also strong, with 59.23% proficiency in 5th grade, compared to the state average of 32.68%. Castle Rock Elementary excels in supporting its Hispanic and English Language Learner student populations, ranking in the top 25% and top 10% of California elementary schools in these subgroups. However, the school's performance for its Asian student population is relatively lower, ranking in the bottom 50% of California elementary schools.

While Castle Rock Elementary's academic performance is generally higher than nearby schools within the Walnut Valley Unified School District, such as Cyrus J. Morris Elementary and Maple Hill Elementary, some schools like Quail Summit Elementary have even stronger academic performance, ranking in the top 2.5% of California elementary schools. Additionally, the increasing percentage of students receiving free or reduced-price lunch at Castle Rock Elementary, from 19.47% in 2020-2021 to 26.78% in 2022-2023, suggests that the school is serving a growing population of economically disadvantaged students, which may present unique challenges and require targeted support.

Detail:

Public K-5

2975 Castle Rock Rd.
Diamond Bar, CA 91765-3420

(909) 598-5006

District: Walnut Valley Unified

SchoolDigger Rank:
790^th of 5,862 California Elementary Schools

Per Pupil Expenditures: $5,089

Students who attend Castle Rock Elementary usually attend:

Middle:	South Pointe Middle
High:	Diamond Bar High

Student/teacher ratio: 26.1

Number of students: 691

Racial breakdown:

Asian:

70.2%

Hispanic:

18.5%

Two or more races:

5.6%

Free/discounted lunch recipients: 27.5%

See top rated California elementary schools

Compare Castle Rock Elementary to nearby elementary schools!

Performance Trends

Compare Details Castle Rock Elementary ranks better than 86.5% of elementary schools in California. It also ranks 8^th among 9 ranked elementary schools in the Walnut Valley Unified School District. (See more...)

Compare Details In 2024 the calculated Average Standard Score was 88.42. (See more...)

Chronic absenteeism in a school refers to a situation where students repeatedly miss school, with the threshold often defined as missing 10% or more of school days for any reason, excused or unexcused.

Student Body

Compare Details Racial makeup is: Asian (70.2%), Hispanic (18.5%), two or more races (5.6%). (See more...)

Compare Details 27.5% of students are receiving a free or discounted lunch. (See more...)

Compare Details (See more...)

Teachers

Compare Details The student/teacher ratio at Castle Rock Elementary is 26.1, which is the 4^th best among 9 elementary schools in the Walnut Valley Unified School District. (See more...)

Compare Castle Rock Elementary employs 26.4 full-time teachers.

Finance

Compare Details The average total spent per student at Castle Rock Elementary is $5,089. 7 elementary schools in the Walnut Valley Unified School District spend more per student.

Schooldigger 2024 Rankings:

Castle Rock Elementary:

SchoolDigger ranks Castle Rock Elementary 790^th of 5862 California public elementary schools. (See Castle Rock Elementary in the ranking list.)

Elementary School Test Score Ratings by Student Subgroup:

English Language Learner students:

Special Education students:

Low Socio Economic Status students:

Female students:

Male students:

Asian students:

Hispanic students:

Walnut Valley Unified:

SchoolDigger ranks Walnut Valley Unified 69^th of 1568 California school districts. (See district ranking list.)

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Rank History for Castle Rock Elementary

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Rank History for all students at Castle Rock Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile
2004	80.14	882^nd	4809	81.7%
2005	83.49	789^th	4822	83.6%
2006	80.98	923^rd	4818	80.8%
2007	82.60	869^th	5113	83.0%
2008	84.94	755^th	5113	85.2%
2009	91.22	405^th	5193	92.2%
2010	91.09	387^th	5314	92.7%
2011	90.96	382^nd	5377	92.9%
2012	87.70	569^th	5390	89.4%
2013	92.01	329^th	5530	94.1%
2015	91.24	556^th	5611	90.1%
2016	94.40	349^th	5614	93.8%
2017	90.63	600^th	5692	89.5%
2018	88.99	684^th	5662	87.9%
2019	89.41	675^th	5789	88.3%
2022	91.98	596^th	5883	89.9%
2023	91.91	578^th	5874	90.2%
2024	88.42	790^th	5862	86.5%

See the entire list of California Elementary School Rankings!

Rank History for English Language Learner students at Castle Rock Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile
2019	96.64	72^nd	3275	97.8%
2022	79.85	299^th	3311	91.0%
2023	76.91	324^th	3250	90.0%
2024	79.19	250^th	3160	92.1%

See the entire list of Best California Elementary Schools for English Language Learner Students!

Rank History for Special Education students at Castle Rock Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile	SchoolDigger Rating
2024	59.59	731^st	2634	72.2%

See the entire list of Best California Elementary Schools for Special Education Students!

Rank History for Low Socio Economic Status students at Castle Rock Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile
2018	85.81	461^st	5084	90.9%
2019	90.68	280^th	5173	94.6%
2022	95.03	182^nd	5264	96.5%
2023	95.86	165^th	5374	96.9%
2024	90.10	446^th	5511	91.9%

See the entire list of Best California Elementary Schools for Low Socio Economic Status Students!

Rank History for Female students at Castle Rock Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile
2018	85.72	790^th	5413	85.4%
2019	85.20	809^th	5492	85.3%
2022	90.01	636^th	5635	88.7%
2023	87.80	753^rd	5617	86.6%
2024	88.38	697^th	5605	87.6%

See the entire list of Best California Elementary Schools for Female Students!

Rank History for Disabled students at Castle Rock Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile	SchoolDigger Rating
2019	57.99	770^th	2585	70.2%
2022	55.78	691^st	2227	69.0%

See the entire list of Best California Elementary Schools for Disabled Students!

Rank History for Male students at Castle Rock Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile
2018	88.95	629^th	5431	88.4%
2019	90.16	570^th	5510	89.7%
2022	91.75	524^th	5663	90.7%
2023	92.01	504^th	5650	91.1%
2024	85.68	840^th	5636	85.1%

See the entire list of Best California Elementary Schools for Male Students!

Rank History for Asian students at Castle Rock Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile
2018	61.88	521^st	1071	51.4%
2019	62.30	514^th	1149	55.3%
2022	62.36	552^nd	1154	52.2%
2023	59.98	607^th	1190	49.0%
2024	54.79	689^th	1203	42.7%

See the entire list of Best California Elementary Schools for Asian Students!

Rank History for Hispanic students at Castle Rock Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile
2018	57.38	1765^th	4830	63.5%
2019	60.89	1637^th	4963	67.0%
2022	88.61	409^th	5084	92.0%
2023	79.62	752^nd	5098	85.2%
2024	68.55	1250^th	5102	75.5%

See the entire list of Best California Elementary Schools for Hispanic Students!

Data source: test scores: California Department of Education, rankings: SchoolDigger.com

As you review the school rankings data, please be aware that some of the information from certain demographics is missing. The reason for this omission is that the data has been redacted from the source data itself due to low population samples in these specific demographic groups.

Redacting data from low population samples is a necessary step to ensure the reliability and accuracy of the results, as small sample sizes may not be representative of the broader population. Additionally, this measure helps protect the privacy of individuals belonging to these demographic groups.

Data source: California Department of Education

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Enrollment information for Castle Rock Elementary

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Year	White	African American	Asian	Hispanic	American Indian	Pacific Islander	Two or More Races	Not Specified	Total
1988	380	26	191	102	0	n/a	n/a	0	699
1989	378	34	263	121	0	n/a	n/a	0	796
1990	311	27	269	101	0	n/a	n/a	0	708
1991	315	31	295	96	0	n/a	n/a	0	737
1992	317	34	311	111	0	n/a	n/a	0	773
1993	274	31	296	102	5	n/a	n/a	0	708
1994	278	39	292	94	0	n/a	n/a	0	703
1995	204	33	326	110	0	n/a	n/a	0	673
1996	204	33	326	110	0	n/a	n/a	0	673
1997	177	37	350	117	0	n/a	n/a	0	681
1998	151	29	375	122	0	n/a	n/a	0	677
1999	150	27	429	104	2	n/a	n/a	0	712
2000	134	25	411	109	1	n/a	n/a	0	680
2001	131	27	385	109	1	n/a	n/a	0	653
2002	122	20	342	118	3	n/a	n/a	0	605
2003	122	20	342	118	3	n/a	n/a	0	605
2004	103	24	368	105	0	n/a	n/a	0	600
2005	96	27	377	101	0	n/a	n/a	0	601
2006	85	27	362	105	0	n/a	n/a	3	582
2007	75	25	370	92	0	n/a	n/a	5	567
2008	75	21	348	98	1	n/a	n/a	0	543
2009	75	17	326	87	1	2	18	0	526
2010	70	19	315	89	2	1	7	0	503
2011	74	18	314	95	3	1	7	0	512
2012	68	22	339	93	2	0	9	0	533
2013	55	18	366	108	1	2	26	0	576
2014	47	15	376	110	2	2	27	0	579
2015	48	16	389	112	2	3	35	0	605
2016	46	9	403	124	1	3	38	0	624
2017	50	10	437	137	1	3	38	0	676
2018	42	7	466	129	1	3	41	0	689
2019	37	6	458	127	1	2	36	0	667
2020	29	5	469	122	1	2	34	0	662
2021	28	8	485	120	1	3	38	0	683
2022	31	8	465	118	1	3	37	0	663
2023	26	8	456	111	1	5	39	0	646
2024	26	7	485	128	1	5	39	0	691

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Enrollment/Ethnicity

For more information about how the Department of Education defines ethnicity, see Defining Race and Ethnicity Data, National Center for Education Statistics

Students eligible for free or discounted lunch at Castle Rock Elementary

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Year	# Students	Full-time Teachers	Student/Teacher ratio	% Free/Discounted Lunch
1988	699	25.0	27.9	n/a
1989	796	30.5	26.0	n/a
1990	708	27.0	26.2	n/a
1991	737	26.0	28.3	n/a
1992	773	26.4	29.2	1.6
1993	708	24.0	29.5	1.1
1994	703	26.6	26.4	2
1995	673	23.0	29.3	2.8
1996	673	23.0	29.3	2.8
1997	681	31.5	21.6	6.5
1998	677	32.5	20.8	6.6
1999	712	33.0	21.6	5.5
2000	680	31.0	21.9	4.3
2001	653	31.0	21.1	7.4
2002	605	29.0	20.9	10.7
2003	605	29.0	20.9	10.7
2004	600	29.5	20.3	14.5
2005	601	29.5	20.4	14.5
2006	582	30.0	19.4	15
2007	567	29.0	19.6	13.3
2008	543	31.0	17.5	7.6
2009	526	26.5	18.5	9.9
2010	503	22.0	22.8	10.5
2011	512	n/a	n/a	9.2
2012	533	21.0	25.3	n/a
2013	576	21.1	27.2	10.2
2014	579	22.5	25.7	5.5
2015	605	23.0	26.3	7.9
2016	624	23.0	27.1	9
2017	676	26.0	26.0	10.1
2018	689	27.0	25.5	20.9
2019	667	26.2	25.4	21.9
2020	662	n/a	n/a	16.3
2021	683	27.2	25.0	19.5
2022	663	28.9	22.9	23.2
2023	646	26.2	24.6	26.8
2024	691	26.4	26.1	27.5

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Students eligible for discounted/free lunch:

The National School Lunch Program (NSLP) provides low-cost or free meals to students in U.S. public and nonprofit private schools based on household income. Those with incomes below 130% of the poverty line receive free lunch, while those between 130% and 185% qualify for reduced-price lunch. The percentage of students receiving free or reduced-price lunch serves as a marker for poverty, as it reflects the socioeconomic status of families in a given school or district. A higher FRPL rate typically indicates a higher concentration of low-income families, suggesting that the school or district may face additional challenges in providing adequate resources and support for student success.

Student/Teacher Ratio Castle Rock Elementary

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Year	# Students	Full-time Teachers	Student/Teacher ratio	% Free/Discounted Lunch
1988	699	25.0	27.9	n/a
1989	796	30.5	26.0	n/a
1990	708	27.0	26.2	n/a
1991	737	26.0	28.3	n/a
1992	773	26.4	29.2	1.6
1993	708	24.0	29.5	1.1
1994	703	26.6	26.4	2
1995	673	23.0	29.3	2.8
1996	673	23.0	29.3	2.8
1997	681	31.5	21.6	6.5
1998	677	32.5	20.8	6.6
1999	712	33.0	21.6	5.5
2000	680	31.0	21.9	4.3
2001	653	31.0	21.1	7.4
2002	605	29.0	20.9	10.7
2003	605	29.0	20.9	10.7
2004	600	29.5	20.3	14.5
2005	601	29.5	20.4	14.5
2006	582	30.0	19.4	15
2007	567	29.0	19.6	13.3
2008	543	31.0	17.5	7.6
2009	526	26.5	18.5	9.9
2010	503	22.0	22.8	10.5
2011	512	n/a	n/a	9.2
2012	533	21.0	25.3	n/a
2013	576	21.1	27.2	10.2
2014	579	22.5	25.7	5.5
2015	605	23.0	26.3	7.9
2016	624	23.0	27.1	9
2017	676	26.0	26.0	10.1
2018	689	27.0	25.5	20.9
2019	667	26.2	25.4	21.9
2020	662	n/a	n/a	16.3
2021	683	27.2	25.0	19.5
2022	663	28.9	22.9	23.2
2023	646	26.2	24.6	26.8
2024	691	26.4	26.1	27.5

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Student-Teacher Ratio

Student/teacher ratio is calculated by dividing the total number of students by the total number of full-time equivalent teachers. Please note that a smaller student/teacher ratio does not necessarily translate to smaller class size. In some instances, schools hire teachers part time, and some teachers are hired for specialized instruction with very small class sizes. These and other factors contribute to the student/teacher ratio. Note: For private schools, Student/teacher ratio may not include Pre-Kindergarten.

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