Erma B. Reese 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 6.

3rd The average 3rd grader meets the grade 3 bar. 2438 vs. 2436.
4th The average 4th grader scores 19 points under the grade 4 bar. 2466 vs. 2485.
5th The average 5th grader scores just under the grade 4 bar. 2479 vs. 2485. The 5th-grade bar is 2528.
6th The average 6th grader scores 27 points under the grade 5 bar. 2501 vs. 2528. The 6th-grade bar is 2552.

2026 results. "Meets standard" is the state's mark for being on track for that grade.

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	79,371	2421.9	− 2436	−14.1	× 84 / 356	−3.3
4	79,372	2479.0	− 2485	−6	× 86 / 356	−1.4
5	79,375	2509.8	− 2528	−18.2	× 92 / 356	−4.7
6	79,376	2518.2	− 2552	−33.8	× 94 / 356	−8.9
Sum, rounded to a whole point						−18

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	73,553	2426.0	− 2436	−10	× 81 / 338	−2.4
4	73,554	2489.4	− 2485	4.4	× 84 / 338	1.1
5	73,556	2515.5	− 2528	−12.5	× 87 / 338	−3.2
6	73,558	2521.0	− 2552	−31	× 86 / 338	−7.9
Sum, rounded to a whole point						−12

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	75,529	2444.2	− 2436	8.2	× 95 / 351	2.2
4	75,531	2480.0	− 2485	−5	× 88 / 351	−1.3
5	75,533	2506.9	− 2528	−21.1	× 86 / 351	−5.2
6	75,536	2532.6	− 2552	−19.4	× 82 / 351	−4.5
Sum, rounded to a whole point						−9

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	75,716	2465.1	− 2436	29.1	× 85 / 343	7.2
4	75,719	2475.5	− 2485	−9.5	× 86 / 343	−2.4
5	75,720	2495.0	− 2528	−33	× 82 / 343	−7.9
6	75,723	2540.8	− 2552	−11.2	× 90 / 343	−2.9
Sum, rounded to a whole point						−6

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,239	2444.4	− 2436	8.4	× 94 / 347	2.3
4	76,240	2489.2	− 2485	4.2	× 81 / 347	1
5	76,241	2494.8	− 2528	−33.2	× 84 / 347	−8
6	76,242	2533.6	− 2552	−18.4	× 88 / 347	−4.7
Sum, rounded to a whole point						−9

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	74,816	2416.5	− 2436	−19.5	× 72 / 301	−4.7
4	74,817	2451.1	− 2485	−33.9	× 79 / 301	−8.9
5	74,818	2460.5	− 2528	−67.5	× 71 / 301	−15.9
6	74,819	2513.6	− 2552	−38.4	× 79 / 301	−10.1
Sum, rounded to a whole point						−40

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,407	2428.7	− 2436	−7.3	× 66 / 308	−1.6
4	76,408	2479.0	− 2485	−6	× 73 / 308	−1.4
5	76,409	2501.4	− 2528	−26.6	× 86 / 308	−7.4
6	76,410	2490.3	− 2552	−61.7	× 83 / 308	−16.6
Sum, rounded to a whole point						−27

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,391	2434.0	− 2436	−2	× 86 / 326	−0.5
4	76,392	2472.0	− 2485	−13	× 70 / 326	−2.8
5	76,393	2489.6	− 2528	−38.4	× 78 / 326	−9.2
6	76,394	2527.8	− 2552	−24.2	× 92 / 326	−6.8
Sum, rounded to a whole point						−19

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,380	2428.4	− 2436	−7.6	× 94 / 333	−2.1
4	76,381	2446.1	− 2485	−38.9	× 90 / 333	−10.5
5	76,382	2484.8	− 2528	−43.2	× 70 / 333	−9.1
6	76,383	2526.3	− 2552	−25.7	× 79 / 333	−6.1
Sum, rounded to a whole point						−28

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,053	2445.8	− 2436	9.8	× 62 / 320	1.9
4	76,054	2471.6	− 2485	−13.4	× 93 / 320	−3.9
5	76,055	2476.1	− 2528	−51.9	× 88 / 320	−14.3
6	76,056	2523.7	− 2552	−28.3	× 77 / 320	−6.8
Sum, rounded to a whole point						−23

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	75,963	2438.2	− 2436	2.2	× 85 / 329	0.6
4	75,964	2465.7	− 2485	−19.3	× 66 / 329	−3.9
5	75,965	2479.1	− 2528	−48.9	× 93 / 329	−13.8
6	75,966	2501.0	− 2552	−51	× 85 / 329	−13.2
Sum, rounded to a whole point						−30

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −18, −12, −9, −6, −9, −40, −27, −19, −28, −23, −30 → −20.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 6 · 2016→2017: 3 · 2017→2018: 3 · 2018→2019: 3 · 2019→2021: 31 · 2021→2022: 13 · 2022→2023: 8 · 2023→2024: 9 · 2024→2025: 5 · 2025→2026: 7 → average 8.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8.8 × 2.66 = 23.4. Upper limit 3.3, lower limit −43.5.

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.