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Edward C. Merlo Institute of Environmental Studies

Public Grades 9-12

1334^th

SchoolDigger Rank ?

of 2,137 California High Schools

Better than 38% of California high schools

Summary

Edward C. Merlo Institute of Environmental Studies is a small high school in Stockton, serving grades 9–12 with 200 students. Its most important academic finding is the sharp contrast between ELA, which is close to the state average, and mathematics, where proficiency is far below both the district and state.

ELA is Merlo’s strongest subject compared with nearby schools: 49% of students were proficient in 2025–2026, about the same as California’s 49% and above the Stockton Unified average of 30%. Merlo was third of seven nearby district high schools in ELA, and its result was 7 points above the peer average. Math is the clearest weakness: 12% were proficient, compared with 18% districtwide and 38% statewide; Merlo ranked fourth of seven nearby peers. Science was in between: 25% proficiency was 6 points above the district, 11 points below the state and close to the nearby-peer average; Merlo ranked third of seven. Graduation and dropout results are notably strong: Merlo reported a 100% graduation rate and 0% dropout rate, compared with 93% and 4% in the district and 88% and 8% statewide.

Scores have improved since 2022–2023: ELA rose 26 percentage points, math 6 points and science 20 points. But the latest year brought a 19-point ELA drop and a 10-point science drop, while math edged up 1 point. SchoolDigger rated Merlo at the 38th percentile with 2 stars in 2025–2026, down from the 58th percentile and 3 stars the year before. Its 2024–2025 student-teacher ratio was 14 students per teacher, the lowest among the seven nearby district schools. In 2024–2025, 79% of students were free/reduced lunch eligible, close to the 80% average among six nearby peers with that measure. SchoolDigger’s student-group rankings were higher for Special Education Students (61st percentile) and lower for Female Students (20th percentile) than Merlo’s overall 38th-percentile standing. With 200 students, results can be sensitive to changes in the tested group.

200

Students ?

14.0

Student/teacher ratio ?

$10,496

Per pupil spending ?

79.0%

Free/reduced lunch eligible (2024-25) ?

All students in California receive free school meals.

1670 East Sixth St.
Stockton, CA 95206-2352

(209) 933-7190

District: Stockton Unified

Racial breakdown:

Hispanic:

91.5%

African American:

4.5%

Asian:

2.5%

See top rated California high schools

Compare Edward C. Merlo Institute of Environmental Studies to nearby high schools!

At a glance

▲ Ranking trend: Improving — 22nd percentile in 2016 → 38th in 2026

Strengths

✓100% graduate in 4 years — above the California average (88%)

✓Ranking is trending up — up 16 percentile points since 2016

Worth a look

!Test scores below the California average (28% vs 42% meeting standards)

!Some student groups rank well below the school's overall statewide standing

!Mathematics scores 27 pts below the California average

Students meeting standards (2025-2026) ?

This school28%

District avg23%

California avg42%

1,334^th of 2,137

California public high schools ?

Bottom 38%▲ up 16 pts since 2016

From bottom 22% (2016) to bottom 38% (2026)

See the entire ranking list of California High Schools →

★★★★★

SchoolDigger rating ?

5^th of 11High Schools in the Stockton Unified

870^th of 968Stockton Unified among California districts

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	California percentile	Rating
2026	37.4	1334 of 2137	37.6%	★★☆☆☆
2025	56.5	898 of 2162	58.5%	★★★☆☆
2024	46.7	1083 of 2159	49.8%	★★☆☆☆
2023	17.4	1767 of 2170	18.6%	★☆☆☆☆
2022	30.6	1413 of 2123	33.4%	★★☆☆☆
2021	15.6	1070 of 1290	17.1%	★☆☆☆☆
2019	36.3	1306 of 2133	38.8%	★★☆☆☆
2018	11.7	1724 of 2017	14.5%	★☆☆☆☆
2017	20.8	1496 of 2021	26.0%	★☆☆☆☆
2016	15.7	1599 of 2039	21.6%	★☆☆☆☆
2015	8.6	1944 of 1994	2.5%	☆☆☆☆☆
2013	17.6	1760 of 2426	27.5%	★☆☆☆☆
2012	15.1	1811 of 2354	23.1%	★☆☆☆☆
2011	13.0	1944 of 2367	17.9%	★☆☆☆☆
2010	13.8	1876 of 2281	17.8%	★☆☆☆☆
2009	42.6	941 of 2238	58.0%	★★★☆☆
2008	44.2	815 of 2117	61.5%	★★★☆☆

English Language Learner

Year	Avg score	Statewide rank	California percentile	Rating
2023	27.1	928 of 1064	12.8%	★☆☆☆☆
2022	36.2	634 of 1044	39.3%	★★☆☆☆
2019	28.1	857 of 941	8.9%	☆☆☆☆☆
2018	25.4	739 of 938	21.2%	★☆☆☆☆

Female

Year	Avg score	Statewide rank	California percentile	Rating
2026	20.9	1489 of 1865	20.2%	★☆☆☆☆
2025	46.4	978 of 1906	48.7%	★★☆☆☆
2024	23.6	1466 of 1915	23.4%	★☆☆☆☆
2023	15.6	1615 of 1915	15.7%	★☆☆☆☆
2022	24.3	1407 of 1858	24.3%	★☆☆☆☆
2021	10.0	966 of 1054	8.3%	☆☆☆☆☆
2019	28.7	1301 of 1833	29.0%	★☆☆☆☆
2018	8.4	1598 of 1760	9.2%	☆☆☆☆☆

Hispanic

Year	Avg score	Statewide rank	California percentile	Rating
2026	42.1	1100 of 1880	41.5%	★★☆☆☆
2025	66.0	578 of 1900	69.6%	★★★☆☆
2024	57.8	738 of 1902	61.2%	★★★☆☆
2023	18.2	1562 of 1917	18.5%	★☆☆☆☆
2022	35.2	1200 of 1861	35.5%	★★☆☆☆
2019	43.7	1026 of 1814	43.4%	★★☆☆☆
2018	12.4	1459 of 1742	16.2%	★☆☆☆☆

Low Socio Economic Status

Year	Avg score	Statewide rank	California percentile	Rating
2026	41.5	1186 of 1999	40.7%	★★☆☆☆
2025	62.2	699 of 2013	65.3%	★★★☆☆
2024	52.1	900 of 2026	55.6%	★★★☆☆
2023	18.1	1651 of 2030	18.7%	★☆☆☆☆
2022	38.9	1153 of 1943	40.7%	★★☆☆☆
2021	16.2	935 of 1126	17.0%	★☆☆☆☆
2019	49.5	939 of 1937	51.5%	★★★☆☆
2018	12.8	1559 of 1862	16.3%	★☆☆☆☆

Male

Year	Avg score	Statewide rank	California percentile	Rating
2026	43.4	1063 of 1932	45.0%	★★☆☆☆
2025	59.5	736 of 1942	62.1%	★★★☆☆
2024	62.0	648 of 1948	66.7%	★★★☆☆
2023	17.5	1596 of 1963	18.7%	★☆☆☆☆
2022	33.3	1216 of 1916	36.5%	★★☆☆☆
2021	16.2	941 of 1122	16.1%	★☆☆☆☆
2019	37.6	1127 of 1880	40.1%	★★☆☆☆
2018	12.2	1556 of 1834	15.2%	★☆☆☆☆

Special Education

Year	Avg score	Statewide rank	California percentile	Rating
2026	50.0	477 of 1235	61.4%	★★★☆☆

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

Special Education (2026)61st percentile+24 vs school

Male (2026)45th percentile+7 vs school

Hispanic (2026)41st percentile+4 vs school

Low Socio Economic Status (2026)41st percentile+3 vs school

Female (2026)20th percentile-17 vs school

English Language Learner (2023)13th percentile-6 vs school

By subject vs California (2025-2026) ?

English Language Arts/Literacy49%~ state avg

Science25%-11 vs state

Mathematics12%-27 vs state

★

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Schools Near Edward C. Merlo Institute of Environmental Studies

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Ranking:

E Elementary M Middle H High A Alternative P Private

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Finance All

School													Students/Teachers											Ranking (2026)				Ranking (2025)				CAST Science (2026)				Smarter Balanced Assessments English Language Arts/Literacy (2026)					Smarter Balanced Assessments Mathematics (2026)					Per Pupil Expenditures (2025)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/reduced lunch (2024-25)	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2026)	Statewide Rank (2026)	State Percentile (2026)	SchoolDigger Rating (2026)	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	Rank Change from Previous Year	CAST Science 8th Grade	CAST Science 11th Grade	CAST Science 12th Grade	CAST Science All Grades	Smarter Balanced Assessments English Language Arts/Literacy 6th Grade	Smarter Balanced Assessments English Language Arts/Literacy 7th Grade	Smarter Balanced Assessments English Language Arts/Literacy 8th Grade	Smarter Balanced Assessments English Language Arts/Literacy 11th Grade	Smarter Balanced Assessments English Language Arts/Literacy All Grades	Smarter Balanced Assessments Mathematics 6th Grade	Smarter Balanced Assessments Mathematics 7th Grade	Smarter Balanced Assessments Mathematics 8th Grade	Smarter Balanced Assessments Mathematics 11th Grade	Smarter Balanced Assessments Mathematics All Grades	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Edward C. Merlo Institute of Environmental Studies	Public	9-12	1670 East Sixth St.	Stockton	95206	San Joaquin County	Stockton Unified	No	(n/a)	No	(n/a)	(209) 933-7190	200	14	14.0	79.0%	2 (1.0%)	9 (4.5%)	183 (91.5%)	5 (2.5%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	37.4	1334^th of 2137 public high schools	37.6%		56.5	898^th of 2162 public high schools	58.5%	436		25.0		25.0				49.0	49.0				11.5	11.5	$10,496	$6,330	$4,166
Aspire Stockton 6-12 Secondary Academy	Public, Charter	6-12	2428 Belleview Ave.	Stockton	95206	San Joaquin County	Aspire Stockton 6-12 Secondary Academy District	Yes	(n/a)	No	(n/a)	(209) 208-9900	326	13	25.1	89.3%	8 (2.5%)	68 (20.9%)	204 (62.6%)	17 (5.2%)	2 (0.6%)	2 (0.6%)	24 (7.4%)	46	1119^th of 2137 public high schools	47.6%					(n/a)	15.1			15.1	16.4	36.0	28.8	58.8	31.9	18.2	15.7	19.2	11.8	16.8	$43,695	$41,516	$2,179
Edison High	Public	9-12	100 West Dr. Martin Luther Kin	Stockton	95206	San Joaquin County	Stockton Unified	No	(n/a)	No	(n/a)	(209) 933-7425	2,355	99	23.7	79.7%	24 (1.0%)	249 (10.6%)	1,738 (73.8%)	247 (10.5%)	14 (0.6%)	9 (0.4%)	70 (3.0%)	23.1	1609^th of 2137 public high schools	24.7%		31.5	1456^th of 2162 public high schools	32.7%	153		16.9	10.2	16.3				32.5	32.5				8.6	8.6	$8,698	$4,380	$4,318
Jane Frederick High	Public	9-12	1141 East Weber Ave.	Stockton	95205	San Joaquin County	Stockton Unified	No	(n/a)	No	(n/a)	(209) 933-7340	178	12	14.7	88.8%	5 (2.8%)	28 (15.7%)	128 (71.9%)	6 (3.4%)	2 (1.1%)	0 (0.0%)	9 (5.1%)	10.2	1944^th of 2137 public high schools	9.0%		9.2	2058^th of 2162 public high schools	4.8%	114		1.4	11.1	4.0				8.0	8.0				2.6	2.6	$12,798	$7,828	$4,970
Stockton Collegiate International Secondary	Public, Charter	6-12	400 E. Main St.	Stockton	95201	San Joaquin County	Stockton Collegiate International Secondary District	Yes	(n/a)	No	(n/a)	(209) 390-9861	466	17	26.9	47.2%	40 (8.6%)	27 (5.8%)	303 (65.0%)	56 (12.0%)	0 (0.0%)	1 (0.2%)	39 (8.4%)								(n/a)
Pride Continuation	Public	10-12	18527 East Main St.	Linden	95236	San Joaquin County	Linden Unified	No	(n/a)	No	(n/a)	(209) 887-3894	27	2	13.5	88.9%	4 (14.8%)	0 (0.0%)	23 (85.2%)	0 (0.0%)	0 (0.0%)	0 (0.0%)	0 (0.0%)								(n/a)				0.0				0.0	0.0						$29,653	$28,488	$1,165
Weber Institute	Public	9-12	302 West Weber Ave.	Stockton	95203	San Joaquin County	Stockton Unified	No	(n/a)	No	(n/a)	(209) 933-7330	358	23	15.5	78.5%	9 (2.5%)	5 (1.4%)	314 (87.7%)	23 (6.4%)	1 (0.3%)	2 (0.6%)	3 (0.8%)	41	1249^th of 2137 public high schools	41.6%		46.9	1099^th of 2162 public high schools	49.2%	150		24.6		24.6				46.4	46.4				20.3	20.3	$9,286	$5,114	$4,172
Stockton High	Public	9-12	22 South Van Buren St.	Stockton	95202	San Joaquin County	Stockton Unified	No	(n/a)	No	(n/a)	(209) 933-7365	191	7	25.5	89.5%	13 (6.8%)	11 (5.8%)	149 (78.0%)	8 (4.2%)	3 (1.6%)	0 (0.0%)	7 (3.7%)	9.2	1992^nd of 2137 public high schools	6.8%		12.7	1889^th of 2162 public high schools	12.6%	103		5.2		6.1				11.5	11.5				1.7	1.7	$3,576	$106	$3,470
Health Careers Academy	Public, Charter	9-12	931 East Magnolia St.	Stockton	95203	San Joaquin County	Stockton Unified	Yes	(n/a)	No	(n/a)	(209) 933-7360	410	23	17.7	79.0%	15 (3.7%)	20 (4.9%)	317 (77.3%)	49 (12.0%)	2 (0.5%)	0 (0.0%)	6 (1.5%)	54.5	933^rd of 2137 public high schools	56.3%		73.3	529^th of 2162 public high schools	75.5%	404		41.8		41.8				60.4	60.4				12.1	12.1	$7,715	$4,384	$3,331
San Joaquin County Regional Occupational Center Program	Public	10-12	2707 Transworld Dr.	Stockton	95213	San Joaquin County	San Joaquin County Regional Occupational Program	No	(n/a)	(n/a)	(n/a)	(209) 468-9005	0			—	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()								(n/a)

Frequently Asked Questions about Edward C. Merlo Institute of Environmental Studies

How many students attend Edward C. Merlo Institute of Environmental Studies?

In the 2024-25 school year, 200 students attended Edward C. Merlo Institute of Environmental Studies.

Is Edward C. Merlo Institute of Environmental Studies a good school?

Edward C. Merlo Institute of Environmental Studies ranks 1334^th of 2137 California high schools. SchoolDigger rates this school 2 stars out of 5.

What district is Edward C. Merlo Institute of Environmental Studies in?

Stockton Unified

What is the racial makeup of Edward C. Merlo Institute of Environmental Studies?

Students at Edward C. Merlo Institute of Environmental Studies are 92% Hispanic, 5% African American, 3% Asian.

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Latest California data All new data »

2025–26 attendance data, dropout rates & graduation ratesNewOct 15, 2026

2025–26 CAST, CSA Spanish & Smarter Balanced Assessments scoresNewOct 15, 2026

2024–25 school spending dataJul 1, 2026

2024–25 attendance dataMar 13, 2026

SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the California Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.