allk12 · Rankings · Biggest declines · California · Ontario

The public schools with the biggest test-score declines in Ontario, California

Across Ontario, California, 33 public schools are ranked here, ranked by the 3-year drop in composite math + reading proficiency. Ranch View Elementary leads the list at -11.7pp, against a median of +5.1pp across the ranked schools.

Use the search box to find a specific school within this ranking, sort by any column, or export the full list. Built from NCES and state data for 2024-25.

Schools ranked

Ontario, California

Best 3-yr change

-11.7pp

Median 3-yr change

+5.1pp

BIGGEST DECLINES · ONTARIO, CALIFORNIA

#	School	City	District	Students	3 yrs ago	Latest	Change
1	Ranch View Elementary	Ontario, CA	Mountain View Elementary	738	54.7%	43.0%	-11.7pp
2	Colony High	Ontario, CA	Chaffey Joint Union High	2,109	43.3%	37.3%	-6.0pp
3	Mountain View Elementary	Ontario, CA	Mountain View Elementary	564	32.9%	31.6%	-1.3pp
4	Del Norte Elementary	Ontario, CA	Ontario-Montclair	428	27.5%	28.3%	+0.7pp
5	Vina Danks Middle	Ontario, CA	Ontario-Montclair	544	27.4%	28.5%	+1.1pp
6	Sultana Elementary	Ontario, CA	Ontario-Montclair	589	33.3%	35.7%	+2.4pp
7	Mission Elementary	Ontario, CA	Ontario-Montclair	571	29.5%	32.2%	+2.8pp
8	Vineyard Elementary	Ontario, CA	Ontario-Montclair	562	35.0%	38.7%	+3.7pp
9	Bon View Elementary	Ontario, CA	Ontario-Montclair	598	27.3%	31.1%	+3.8pp
10	Ray Wiltsey Middle	Ontario, CA	Ontario-Montclair	727	26.4%	30.2%	+3.9pp
11	Arroyo Elementary	Ontario, CA	Ontario-Montclair	493	27.3%	31.5%	+4.3pp
12	Creek View Elementary	Ontario, CA	Mountain View Elementary	566	37.6%	42.0%	+4.4pp
13	Berlyn Elementary	Ontario, CA	Ontario-Montclair	639	23.1%	27.6%	+4.5pp
14	Lincoln Elementary	Ontario, CA	Ontario-Montclair	530	31.1%	35.5%	+4.5pp
15	Chaffey High	Ontario, CA	Chaffey Joint Union High	3,127	34.9%	39.6%	+4.7pp
16	Woodcrest Junior High	Ontario, CA	Chino Valley Unified	324	41.9%	46.8%	+4.9pp
17	Ontario High	Ontario, CA	Chaffey Joint Union High	1,994	40.9%	46.0%	+5.1pp
18	Edison Elementary	Ontario, CA	Ontario-Montclair	736	63.6%	68.9%	+5.2pp
19	Oaks Middle	Ontario, CA	Ontario-Montclair	668	39.0%	44.4%	+5.4pp
20	Richard Haynes Elementary	Ontario, CA	Ontario-Montclair	641	28.4%	33.9%	+5.5pp
21	Levi H. Dickey Elementary	Ontario, CA	Chino Valley Unified	413	33.9%	39.7%	+5.9pp
22	Grace Yokley Junior High	Ontario, CA	Mountain View Elementary	606	40.9%	46.9%	+6.0pp
23	Central Language Academy	Ontario, CA	Ontario-Montclair	736	36.7%	42.7%	+6.0pp
24	Ontario Center	Ontario, CA	Cucamonga Elementary	585	20.2%	26.5%	+6.3pp
25	Euclid Elementary	Ontario, CA	Ontario-Montclair	572	25.9%	32.4%	+6.5pp
26	De Anza Middle	Ontario, CA	Ontario-Montclair	510	35.3%	41.9%	+6.6pp
27	Vista Grande Elementary	Ontario, CA	Ontario-Montclair	358	40.7%	47.8%	+7.1pp
28	Hawthorne Elementary	Ontario, CA	Ontario-Montclair	549	25.8%	34.3%	+8.4pp
29	Mariposa Elementary	Ontario, CA	Ontario-Montclair	537	17.2%	25.7%	+8.4pp
30	Liberty Elementary	Ontario, CA	Chino Valley Unified	578	46.7%	55.6%	+9.0pp
31	El Camino Elementary	Ontario, CA	Ontario-Montclair	476	29.2%	39.8%	+10.6pp
32	Elderberry Elementary	Ontario, CA	Ontario-Montclair	544	34.3%	45.7%	+11.4pp
33	Corona Elementary	Ontario, CA	Ontario-Montclair	414	34.8%	47.9%	+13.1pp

Page 1 of 1 · top 33 of 33 ranked. NCES + state assessment data, 2024-25.↓ Download full CSV

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DATA NOTICE

allk12 is independent and not affiliated with, endorsed by, or sponsored by NCES, the US Census Bureau, any state education agency or assessment program, or any other government agency. Source data is compiled from public records and provided "as is," without warranty of accuracy or completeness. You rely on it, and any analysis derived from it, at your own risk. See the full disclaimer.