Is Armstrong Elementary a good school?

Armstrong Elementary ranks 2255 th of 5862 California elementary schools. SchoolDigger rates this school 3 stars out of 5.

How many students attend Armstrong Elementary?

In the 2022-23 school year, 257 students attended Armstrong Elementary.

What is the racial makeup of Armstrong Elementary?

Students at Armstrong Elementary are 63% Hispanic, 12% Asian, 10% Two or more races, 9% White, 6% African American.

What schools do graduates of Armstrong Elementary attend?

Students who attend Armstrong Elementary usually go on to attend: Middle : Lorbeer Middle High : Diamond Ranch High

Armstrong Elementary

Summary:

Armstrong Elementary is a public elementary school in Diamond Bar, California, serving 257 students in grades K-6. As part of the Pomona Unified School District, which is ranked 1056 out of 1568 districts in the state, Armstrong Elementary stands out as a relatively high-performing school within the district.

Armstrong Elementary consistently outperforms the Pomona Unified School District and the state of California in Smarter Balanced Assessments for English Language Arts/Literacy and Mathematics across all grade levels. For the 2023-2024 school year, the school's proficiency rates in ELA/Literacy ranged from 43.24% to 65.63%, compared to 28.72% to 37.67% for Pomona Unified and 42.8% to 47.04% for California. In Mathematics, Armstrong Elementary's proficiency rates ranged from 28.13% to 50%, compared to 18.67% to 29.27% for Pomona Unified and 34.31% to 45.64% for California. The school's Hispanic students and students from low socioeconomic backgrounds also perform significantly better than their counterparts in the district and state.

While Armstrong Elementary's academic performance is generally stronger than the other Pomona Unified schools in the area, such as Kellogg Polytechnic Elementary and Pantera Elementary, the nearby schools in the Walnut Valley Unified School District, such as Maple Hill Elementary and Quail Summit Elementary, consistently outperform Armstrong Elementary across all academic measures. However, the school faces challenges with rising chronic absenteeism, which may be impacting its overall academic performance.

Detail:

Public K-6

22750 Beaverhead Dr.
Diamond Bar, CA 91765-1566

(909) 397-4563

District: Pomona Unified

SchoolDigger Rank:
2255^th of 5,862 California Elementary Schools

Per Pupil Expenditures: $5,470

Students who attend Armstrong Elementary usually attend:

Middle:	Lorbeer Middle
High:	Diamond Ranch High

Student/teacher ratio: 18.3

Number of students: 257

Racial breakdown:

Hispanic:

62.6%

Asian:

12.1%

Two or more races:

9.7%

Free/discounted lunch recipients: 67.3%

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Performance Trends

Compare Details Armstrong Elementary ranks better than 61.5% of elementary schools in California. It also ranks 4^th among 24 ranked elementary schools in the Pomona Unified School District. (See more...)

Compare Details In 2024 the calculated Average Standard Score was 55.48. (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 Armstrong Elementary has the smallest elementary school student body size in the Pomona Unified School District. Racial makeup is: Hispanic (62.6%), Asian (12.1%), two or more races (9.7%). (See more...)

Compare Details 67.3% of students are receiving a free or discounted lunch. (See more...)

Compare Details (See more...)

Teachers

Compare Details The student/teacher ratio at Armstrong Elementary is 18.3, which is the lowest among 24 elementary schools in the Pomona Unified School District! (See more...)

Compare Armstrong Elementary employs 14 full-time teachers.

Finance

Compare Details The average total spent per student at Armstrong Elementary is $5,470, which is the 8^th highest among 24 elementary schools in the Pomona Unified School District.

Schooldigger 2024 Rankings:

Armstrong Elementary:

SchoolDigger ranks Armstrong Elementary 2255^th of 5862 California public elementary schools. (See Armstrong Elementary in the ranking list.)

Elementary School Test Score Ratings by Student Subgroup:

Low Socio Economic Status students:

Female students:

Male students:

Hispanic students:

Pomona Unified:

SchoolDigger ranks Pomona Unified 1056^th of 1568 California school districts. (See district ranking list.)

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Rank History for Armstrong Elementary

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Rank History for all students at Armstrong Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile
2004	73.40	1177^th	4809	75.5%
2005	70.94	1292^nd	4822	73.2%
2006	63.09	1626^th	4818	66.3%
2007	70.17	1370^th	5113	73.2%
2008	73.57	1254^th	5113	75.5%
2009	61.43	1851^st	5193	64.4%
2010	65.02	1720^th	5314	67.6%
2011	57.20	2186^th	5377	59.3%
2012	58.43	2131^st	5390	60.5%
2013	49.42	2721^st	5530	50.8%
2015	62.83	1807^th	5611	67.8%
2016	52.88	2349^th	5614	58.2%
2017	49.83	2552^nd	5692	55.2%
2018	58.75	2097^th	5662	63.0%
2019	65.79	1800^th	5789	68.9%
2022	58.05	2117^th	5883	64.0%
2023	59.80	2064^th	5874	64.9%
2024	55.48	2255^th	5862	61.5%

See the entire list of California Elementary School Rankings!

Rank History for Low Socio Economic Status students at Armstrong Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile
2018	53.91	2111^th	5084	58.5%
2019	68.19	1271^st	5173	75.4%
2022	58.30	1778^th	5264	66.2%
2023	64.55	1498^th	5374	72.1%
2024	61.20	1716^th	5511	68.9%

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

Rank History for Female students at Armstrong Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile
2018	59.89	1983^rd	5413	63.4%
2019	56.88	2123^rd	5492	61.3%
2022	53.60	2237^th	5635	60.3%
2023	56.00	2128^th	5617	62.1%
2024	44.72	2741^st	5605	51.1%

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

Rank History for Disabled students at Armstrong Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile	SchoolDigger Rating
2019	36.12	1469^th	2585	43.2%

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

Rank History for Male students at Armstrong Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile
2018	52.72	2299^th	5431	57.7%
2019	74.01	1348^th	5510	75.5%
2022	61.31	1898^th	5663	66.5%
2023	61.61	1876^th	5650	66.8%
2024	60.00	1977^th	5636	64.9%

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

Rank History for Hispanic students at Armstrong Elementary

Year	Avg Standard Score	Statewide Rank	Total # Ranked Elementary Schools	CA State Percentile
2018	55.32	1874^th	4830	61.2%
2019	66.06	1349^th	4963	72.8%
2022	68.84	1210^th	5084	76.2%
2023	73.78	1006^th	5098	80.3%
2024	58.35	1762^nd	5102	65.5%

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 Armstrong Elementary

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Year	White	African American	Asian	Hispanic	American Indian	Pacific Islander	Two or More Races	Not Specified	Total
1988	190	24	19	99	0	n/a	n/a	0	332
1989	226	30	30	124	0	n/a	n/a	0	410
1990	211	49	44	110	0	n/a	n/a	0	414
1991	213	54	63	104	0	n/a	n/a	0	434
1992	206	55	70	116	0	n/a	n/a	0	447
1993	222	50	92	124	0	n/a	n/a	0	488
1994	207	58	102	155	0	n/a	n/a	0	522
1995	183	71	113	174	0	n/a	n/a	0	541
1996	183	71	113	174	0	n/a	n/a	0	541
1997	187	62	109	184	0	n/a	n/a	0	542
1998	163	48	116	194	0	n/a	n/a	0	521
1999	170	52	109	217	0	n/a	n/a	0	548
2000	154	42	110	183	0	n/a	n/a	0	489
2001	137	45	130	195	2	n/a	n/a	0	509
2002	152	54	153	210	2	n/a	n/a	0	571
2003	152	54	153	210	2	n/a	n/a	0	571
2004	132	51	140	226	1	n/a	n/a	0	550
2005	127	46	116	218	1	n/a	n/a	0	508
2006	109	42	104	211	0	n/a	n/a	0	466
2007	97	32	89	226	0	n/a	n/a	1	445
2008	90	26	81	200	n/a	n/a	n/a	0	397
2009	87	22	76	196	0	6	3	0	390
2010	50	17	61	188	1	1	19	0	337
2011	39	16	52	167	1	1	16	0	292
2012	38	24	46	175	1	0	18	0	302
2013	55	38	53	225	4	1	24	0	400
2014	54	40	48	245	3	1	27	0	418
2015	49	31	58	244	2	1	30	0	415
2016	40	31	56	252	1	1	25	0	406
2017	42	29	60	230	0	1	21	0	383
2018	31	20	53	190	0	1	20	0	315
2019	27	18	47	186	0	0	15	0	293
2020	23	24	39	186	0	0	21	0	293
2021	18	23	34	191	0	0	25	0	291
2022	20	16	33	168	0	0	23	0	260
2023	24	16	31	161	0	0	25	0	257

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 Armstrong Elementary

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Year	# Students	Full-time Teachers	Student/Teacher ratio	% Free/Discounted Lunch
1988	332	13.0	25.5	n/a
1989	410	16.0	25.6	n/a
1990	414	18.0	23.0	n/a
1991	434	18.0	24.1	n/a
1992	447	18.3	24.4	10.5
1993	488	18.0	27.1	13.1
1994	522	18.0	29.0	16.7
1995	541	20.0	27.1	17
1996	541	20.0	27.1	17
1997	542	21.0	25.8	18.5
1998	521	26.0	20.0	24
1999	548	27.0	20.3	22.1
2000	489	24.0	20.4	21.1
2001	509	25.0	20.4	21.8
2002	571	29.0	19.7	18.6
2003	571	29.0	19.7	18.6
2004	550	26.0	21.2	23.1
2005	508	24.5	20.7	13
2006	466	23.0	20.3	21.7
2007	445	22.0	20.2	21.6
2008	397	21.0	18.9	25.7
2009	390	17.0	20.5	25.4
2010	337	17.0	19.8	30.9
2011	292	n/a	n/a	33.6
2012	302	14.0	21.5	n/a
2013	400	16.0	25.0	44.3
2014	418	15.0	27.8	46.7
2015	415	15.0	27.6	49.2
2016	406	14.0	29.0	54.2
2017	383	15.0	25.5	55.6
2018	315	14.0	22.5	62.9
2019	293	14.0	20.9	72.7
2020	293	n/a	n/a	65.9
2021	291	13.7	21.2	74.6
2022	260	13.0	20.0	72.7
2023	257	14.0	18.3	67.3

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 Armstrong Elementary

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Year	# Students	Full-time Teachers	Student/Teacher ratio	% Free/Discounted Lunch
1988	332	13.0	25.5	n/a
1989	410	16.0	25.6	n/a
1990	414	18.0	23.0	n/a
1991	434	18.0	24.1	n/a
1992	447	18.3	24.4	10.5
1993	488	18.0	27.1	13.1
1994	522	18.0	29.0	16.7
1995	541	20.0	27.1	17
1996	541	20.0	27.1	17
1997	542	21.0	25.8	18.5
1998	521	26.0	20.0	24
1999	548	27.0	20.3	22.1
2000	489	24.0	20.4	21.1
2001	509	25.0	20.4	21.8
2002	571	29.0	19.7	18.6
2003	571	29.0	19.7	18.6
2004	550	26.0	21.2	23.1
2005	508	24.5	20.7	13
2006	466	23.0	20.3	21.7
2007	445	22.0	20.2	21.6
2008	397	21.0	18.9	25.7
2009	390	17.0	20.5	25.4
2010	337	17.0	19.8	30.9
2011	292	n/a	n/a	33.6
2012	302	14.0	21.5	n/a
2013	400	16.0	25.0	44.3
2014	418	15.0	27.8	46.7
2015	415	15.0	27.6	49.2
2016	406	14.0	29.0	54.2
2017	383	15.0	25.5	55.6
2018	315	14.0	22.5	62.9
2019	293	14.0	20.9	72.7
2020	293	n/a	n/a	65.9
2021	291	13.7	21.2	74.6
2022	260	13.0	20.0	72.7
2023	257	14.0	18.3	67.3

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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