Potrero Elementary: math

The shaded band is this school's normal range. If nothing about how it works changes, nearly every future year should land inside it. Zero means the typical student just meets the state standard. The small numbers under the years are how many students were tested.

Measured against the grade bars

The state's math test uses one scale for every grade, so a score means the same thing in grade 3 as in grade 8.

Many students here are still learning English. The math test is written in English, with some translation help, and many of its questions are word problems. In 2026, 143 of the 459 students who took the math test were English learners.

All students

3rd The average 3rd grader scores just under the grade 3 bar. 2428 vs. 2436.
4th The average 4th grader scores 38 points under the grade 4 bar. 2447 vs. 2485.
5th The average 5th grader scores 18 points under the grade 4 bar. 2467 vs. 2485. The 5th-grade bar is 2528.
6th The average 6th grader scores 35 points under the grade 5 bar. 2494 vs. 2528. The 6th-grade bar is 2552.
7th The average 7th grader scores 10 points under the grade 5 bar. 2518 vs. 2528. The 7th-grade bar is 2567.
8th The average 8th grader scores 15 points under the grade 7 bar. 2553 vs. 2567. The 8th-grade bar is 2586.

Students fluent in English

Math with English out of the way. Includes students who have only ever spoken English.

Grade bars 3rd 29 students Meets the grade 3 bar. 4th 32 students 13 points under the grade 4 bar. 5th 45 students 33 points under the grade 5 bar. 6th 58 students Just under the grade 5 bar. 7th 83 students Just under the grade 6 bar. 8th 69 students Just under the grade 8 bar.

English learners

Students leave this group as they become fluent, so its average stays low even where they learn well.

Grade bars 3rd 23 students 29 points under the grade 3 bar. 4th 23 students 23 points under the grade 3 bar. 5th 31 students 11 points under the grade 3 bar. 6th 21 students 24 points under the grade 3 bar. 7th 26 students 16 points under the grade 3 bar. 8th 19 students 21 points under the grade 4 bar.

the group's average that grade's own bar the distance between

2026 results. "Meets standard" is the state's mark for being on track for that grade. The state leaves out any group of ten students or fewer, so a grade may be missing from the charts.

Step 1 · Each year's result

For each grade tested, take the average (mean) scale score from the California Department of Education's results file, and subtract the lowest score that counts as "Standard Met" for that grade. That is the grade's distance from standard. Weight each grade by its share of the students tested, then add the grades up. Grades where the state hides the average because ten or fewer students tested are left out entirely.

2015 from sb_ca2015_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,287	2367.5	− 2436	−68.5	× 102 / 678	−10.3
4	23,288	2421.8	− 2485	−63.2	× 91 / 678	−8.5
5	23,291	2443.4	− 2528	−84.6	× 87 / 678	−10.9
6	23,292	2448.6	− 2552	−103.4	× 86 / 678	−13.1
7	23,295	2499.4	− 2567	−67.6	× 178 / 678	−17.7
8	23,296	2525.9	− 2586	−60.1	× 134 / 678	−11.9
Sum, rounded to a whole point						−72

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,878	2386.5	− 2436	−49.5	× 88 / 664	−6.6
4	21,879	2415.5	− 2485	−69.5	× 97 / 664	−10.2
5	21,881	2457.3	− 2528	−70.7	× 87 / 664	−9.3
6	21,884	2443.0	− 2552	−109	× 90 / 664	−14.8
7	21,885	2479.5	− 2567	−87.5	× 130 / 664	−17.1
8	21,887	2529.5	− 2586	−56.5	× 172 / 664	−14.6
Sum, rounded to a whole point						−73

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,294	2394.8	− 2436	−41.2	× 95 / 631	−6.2
4	22,297	2419.8	− 2485	−65.2	× 90 / 631	−9.3
5	22,298	2432.0	− 2528	−96	× 93 / 631	−14.1
6	22,301	2457.7	− 2552	−94.3	× 90 / 631	−13.5
7	22,302	2499.5	− 2567	−67.5	× 134 / 631	−14.3
8	22,305	2492.7	− 2586	−93.3	× 129 / 631	−19.1
Sum, rounded to a whole point						−77

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,282	2393.9	− 2436	−42.1	× 91 / 621	−6.2
4	22,283	2435.5	− 2485	−49.5	× 93 / 621	−7.4
5	22,286	2459.6	− 2528	−68.4	× 90 / 621	−9.9
6	22,287	2456.5	− 2552	−95.5	× 90 / 621	−13.8
7	22,290	2519.6	− 2567	−47.4	× 125 / 621	−9.5
8	22,291	2519.7	− 2586	−66.3	× 132 / 621	−14.1
Sum, rounded to a whole point						−61

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,462	2424.5	− 2436	−11.5	× 83 / 622	−1.5
4	22,463	2445.5	− 2485	−39.5	× 90 / 622	−5.7
5	22,464	2456.4	− 2528	−71.6	× 90 / 622	−10.4
6	22,465	2473.2	− 2552	−78.8	× 90 / 622	−11.4
7	22,466	2523.1	− 2567	−43.9	× 142 / 622	−10
8	22,467	2524.4	− 2586	−61.6	× 127 / 622	−12.6
Sum, rounded to a whole point						−52

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,429	2405.2	− 2436	−30.8	× 57 / 526	−3.3
4	22,430	2433.5	− 2485	−51.5	× 71 / 526	−7
5	22,431	2451.9	− 2528	−76.1	× 64 / 526	−9.3
6	22,432	2466.0	− 2552	−86	× 75 / 526	−12.3
7	22,433	2511.0	− 2567	−56	× 135 / 526	−14.4
8	22,434	2499.2	− 2586	−86.8	× 124 / 526	−20.5
Sum, rounded to a whole point						−67

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,404	2415.3	− 2436	−20.7	× 73 / 485	−3.1
4	22,405	2431.2	− 2485	−53.8	× 57 / 485	−6.3
5	22,406	2471.4	− 2528	−56.6	× 67 / 485	−7.8
6	22,407	2454.7	− 2552	−97.3	× 62 / 485	−12.4
7	22,408	2539.4	− 2567	−27.6	× 102 / 485	−5.8
8	22,409	2509.7	− 2586	−76.3	× 124 / 485	−19.5
Sum, rounded to a whole point						−55

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,254	2409.8	− 2436	−26.2	× 70 / 458	−4
4	22,255	2435.0	− 2485	−50	× 73 / 458	−8
5	22,256	2475.4	− 2528	−52.6	× 60 / 458	−6.9
6	22,257	2466.2	− 2552	−85.8	× 69 / 458	−12.9
7	22,258	2514.6	− 2567	−52.4	× 92 / 458	−10.5
8	22,259	2533.1	− 2586	−52.9	× 94 / 458	−10.9
Sum, rounded to a whole point						−53

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,165	2412.0	− 2436	−24	× 55 / 450	−2.9
4	22,166	2439.9	− 2485	−45.1	× 69 / 450	−6.9
5	22,167	2488.8	− 2528	−39.2	× 76 / 450	−6.6
6	22,168	2463.1	− 2552	−88.9	× 63 / 450	−12.4
7	22,169	2496.1	− 2567	−70.9	× 92 / 450	−14.5
8	22,170	2492.4	− 2586	−93.6	× 95 / 450	−19.8
Sum, rounded to a whole point						−63

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	22,221	2428.1	− 2436	−7.9	× 52 / 459	−0.9
4	22,222	2447.1	− 2485	−37.9	× 55 / 459	−4.5
5	22,223	2466.6	− 2528	−61.4	× 76 / 459	−10.2
6	22,224	2493.5	− 2552	−58.5	× 79 / 459	−10.1
7	22,225	2518.1	− 2567	−48.9	× 109 / 459	−11.6
8	22,226	2552.5	− 2586	−33.5	× 88 / 459	−6.4
Sum, rounded to a whole point						−44

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −72, −73, −77, −61, −52, −67, −55, −53, −63, −44 → −61.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 1 · 2016→2017: 4 · 2017→2018: 16 · 2018→2019: 9 · 2019→2022: 15 · 2022→2023: 12 · 2023→2024: 2 · 2024→2025: 10 · 2025→2026: 19 → average 9.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.8 × 2.66 = 26.1. Upper limit −35.6, lower limit −87.8.

Why 2.66? It is the standard factor from quality control, the work of Walter Shewhart and W. Edwards Deming. It turns "how much the result typically changes in a year" into "how far it can wander by chance alone".

Years with no result (no state tests were given in spring 2020) are skipped: the year-to-year change runs from the last year with a result to the next one.

Step 3 · Free or reduced-price meals

The share of enrolled students eligible for free or reduced-price meals. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.