Ruth Brown 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 3 bar

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.

3rd The average 3rd grader scores 39 points under the grade 3 bar. 2397 vs. 2436.
4th The average 4th grader scores 31 points under the grade 3 bar. 2405 vs. 2436. The 4th-grade bar is 2485.
5th The average 5th grader scores 42 points under the grade 3 bar. 2394 vs. 2436. The 5th-grade bar is 2528.
6th The average 6th grader scores just under the grade 3 bar. 2432 vs. 2436. The 6th-grade bar is 2552.
7th The average 7th grader scores 17 points under the grade 3 bar. 2419 vs. 2436. The 7th-grade bar is 2567.
8th The average 8th grader scores just under the grade 3 bar. 2434 vs. 2436. The 8th-grade bar is 2586.

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	57,796	2391.8	− 2436	−44.2	× 90 / 378	−10.5
4	57,798	2400.8	− 2485	−84.2	× 75 / 378	−16.7
5	57,800	2419.6	− 2528	−108.4	× 59 / 378	−16.9
6	57,802	2446.2	− 2552	−105.8	× 82 / 378	−23
7	57,804	2472.1	− 2567	−94.9	× 72 / 378	−18.1
Sum, rounded to a whole point						−85

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	53,653	2387.2	− 2436	−48.8	× 74 / 421	−8.6
4	53,656	2411.0	− 2485	−74	× 78 / 421	−13.7
5	53,658	2407.0	− 2528	−121	× 72 / 421	−20.7
6	53,660	2428.8	− 2552	−123.2	× 67 / 421	−19.6
7	53,661	2473.7	− 2567	−93.3	× 67 / 421	−14.8
8	53,663	2464.6	− 2586	−121.4	× 63 / 421	−18.2
Sum, rounded to a whole point						−96

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,211	2406.2	− 2436	−29.8	× 71 / 414	−5.1
4	55,213	2412.6	− 2485	−72.4	× 71 / 414	−12.4
5	55,214	2423.5	− 2528	−104.5	× 71 / 414	−17.9
6	55,216	2379.9	− 2552	−172.1	× 68 / 414	−28.3
7	55,218	2457.8	− 2567	−109.2	× 64 / 414	−16.9
8	55,221	2466.9	− 2586	−119.1	× 69 / 414	−19.9
Sum, rounded to a whole point						−100

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,305	2404.0	− 2436	−32	× 61 / 386	−5.1
4	55,307	2417.0	− 2485	−68	× 61 / 386	−10.7
5	55,309	2444.4	− 2528	−83.6	× 67 / 386	−14.5
6	55,311	2419.1	− 2552	−132.9	× 65 / 386	−22.4
7	55,313	2457.0	− 2567	−110	× 69 / 386	−19.7
8	55,315	2453.4	− 2586	−132.6	× 63 / 386	−21.6
Sum, rounded to a whole point						−94

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,567	2398.2	− 2436	−37.8	× 66 / 413	−6
4	55,568	2402.2	− 2485	−82.8	× 64 / 413	−12.8
5	55,569	2431.7	− 2528	−96.3	× 64 / 413	−14.9
6	55,570	2458.1	− 2552	−93.9	× 72 / 413	−16.4
7	55,571	2453.7	− 2567	−113.3	× 65 / 413	−17.8
8	55,572	2458.9	− 2586	−127.1	× 82 / 413	−25.2
Sum, rounded to a whole point						−93

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,621	2360.6	− 2436	−75.4	× 52 / 389	−10.1
4	55,622	2364.9	− 2485	−120.1	× 74 / 389	−22.8
5	55,623	2438.7	− 2528	−89.3	× 64 / 389	−14.7
6	55,624	2410.7	− 2552	−141.3	× 71 / 389	−25.8
7	55,625	2450.5	− 2567	−116.5	× 64 / 389	−19.2
8	55,626	2459.5	− 2586	−126.5	× 64 / 389	−20.8
Sum, rounded to a whole point						−113

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,570	2362.8	− 2436	−73.2	× 71 / 390	−13.3
4	55,571	2372.4	− 2485	−112.6	× 56 / 390	−16.2
5	55,572	2416.1	− 2528	−111.9	× 68 / 390	−19.5
6	55,573	2415.6	− 2552	−136.4	× 61 / 390	−21.3
7	55,574	2435.1	− 2567	−131.9	× 65 / 390	−22
8	55,575	2433.4	− 2586	−152.6	× 69 / 390	−27
Sum, rounded to a whole point						−119

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,446	2347.2	− 2436	−88.8	× 60 / 373	−14.3
4	55,447	2385.2	− 2485	−99.8	× 81 / 373	−21.7
5	55,448	2370.9	− 2528	−157.1	× 51 / 373	−21.5
6	55,449	2425.7	− 2552	−126.3	× 58 / 373	−19.6
7	55,450	2456.7	− 2567	−110.3	× 59 / 373	−17.4
8	55,451	2428.8	− 2586	−157.2	× 64 / 373	−27
Sum, rounded to a whole point						−121

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,198	2383.1	− 2436	−52.9	× 66 / 343	−10.2
4	55,199	2405.7	− 2485	−79.3	× 55 / 343	−12.7
5	55,200	2398.7	− 2528	−129.3	× 66 / 343	−24.9
6	55,201	2399.1	− 2552	−152.9	× 45 / 343	−20.1
7	55,202	2446.9	− 2567	−120.1	× 55 / 343	−19.3
8	55,203	2432.8	− 2586	−153.2	× 56 / 343	−25
Sum, rounded to a whole point						−112

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,113	2396.8	− 2436	−39.2	× 57 / 329	−6.8
4	55,114	2405.0	− 2485	−80	× 60 / 329	−14.6
5	55,115	2393.6	− 2528	−134.4	× 52 / 329	−21.2
6	55,116	2432.4	− 2552	−119.6	× 64 / 329	−23.3
7	55,117	2419.1	− 2567	−147.9	× 41 / 329	−18.4
8	55,118	2433.8	− 2586	−152.2	× 55 / 329	−25.4
Sum, rounded to a whole point						−110

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −85, −96, −100, −94, −93, −113, −119, −121, −112, −110 → −104.3
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 11 · 2016→2017: 4 · 2017→2018: 6 · 2018→2019: 1 · 2019→2022: 20 · 2022→2023: 6 · 2023→2024: 2 · 2024→2025: 9 · 2025→2026: 2 → average 6.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.8 × 2.66 = 18.1. Upper limit −86.2, lower limit −122.4.

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.