Roosevelt 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.

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	39,062	2363.9	− 2436	−72.1	× 124 / 463	−19.3
4	39,064	2418.3	− 2485	−66.7	× 130 / 463	−18.7
5	39,066	2436.0	− 2528	−92	× 142 / 463	−28.2
6	39,068	2499.0	− 2552	−53	× 67 / 463	−7.7
Sum, rounded to a whole point						−74

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,239	2398.0	− 2436	−38	× 108 / 494	−8.3
4	36,241	2440.4	− 2485	−44.6	× 116 / 494	−10.5
5	36,242	2449.0	− 2528	−79	× 125 / 494	−20
6	36,244	2451.1	− 2552	−100.9	× 91 / 494	−18.6
7	36,247	2480.9	− 2567	−86.1	× 54 / 494	−9.4
Sum, rounded to a whole point						−67

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,994	2426.6	− 2436	−9.4	× 155 / 528	−2.8
4	36,997	2465.5	− 2485	−19.5	× 106 / 528	−3.9
5	36,998	2472.0	− 2528	−56	× 108 / 528	−11.5
6	37,001	2484.7	− 2552	−67.3	× 69 / 528	−8.8
7	37,002	2529.0	− 2567	−38	× 61 / 528	−4.4
8	37,005	2486.2	− 2586	−99.8	× 29 / 528	−5.5
Sum, rounded to a whole point						−37

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,962	2376.4	− 2436	−59.6	× 96 / 501	−11.4
4	36,965	2446.2	− 2485	−38.8	× 138 / 501	−10.7
5	36,966	2443.7	− 2528	−84.3	× 102 / 501	−17.2
6	36,969	2469.5	− 2552	−82.5	× 69 / 501	−11.4
7	36,971	2457.9	− 2567	−109.1	× 64 / 501	−13.9
8	36,973	2478.6	− 2586	−107.4	× 32 / 501	−6.9
Sum, rounded to a whole point						−71

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,160	2427.9	− 2436	−8.1	× 97 / 471	−1.7
4	37,161	2461.5	− 2485	−23.5	× 89 / 471	−4.4
5	37,162	2504.8	− 2528	−23.2	× 132 / 471	−6.5
6	37,163	2490.3	− 2552	−61.7	× 61 / 471	−8
7	37,164	2474.0	− 2567	−93	× 41 / 471	−8.1
8	37,165	2481.3	− 2586	−104.7	× 51 / 471	−11.3
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	37,079	2389.6	− 2436	−46.4	× 74 / 410	−8.4
4	37,080	2423.1	− 2485	−61.9	× 98 / 410	−14.8
5	37,081	2413.8	− 2528	−114.2	× 76 / 410	−21.2
6	37,082	2476.0	− 2552	−76	× 61 / 410	−11.3
7	37,083	2427.7	− 2567	−139.3	× 40 / 410	−13.6
8	37,084	2470.0	− 2586	−116	× 61 / 410	−17.3
Sum, rounded to a whole point						−86

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,112	2431.3	− 2436	−4.7	× 67 / 369	−0.9
4	37,113	2454.9	− 2485	−30.1	× 78 / 369	−6.4
5	37,114	2417.8	− 2528	−110.2	× 88 / 369	−26.3
6	37,115	2471.2	− 2552	−80.8	× 49 / 369	−10.7
7	37,116	2521.5	− 2567	−45.5	× 49 / 369	−6
8	37,117	2483.8	− 2586	−102.2	× 38 / 369	−10.5
Sum, rounded to a whole point						−61

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,962	2438.5	− 2436	2.5	× 72 / 335	0.5
4	36,963	2499.1	− 2485	14.1	× 65 / 335	2.7
5	36,964	2433.7	− 2528	−94.3	× 67 / 335	−18.9
6	36,965	2437.6	− 2552	−114.4	× 64 / 335	−21.9
7	36,966	2473.4	− 2567	−93.6	× 33 / 335	−9.2
8	36,967	2563.2	− 2586	−22.8	× 34 / 335	−2.3
Sum, rounded to a whole point						−49

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,799	2433.5	− 2436	−2.5	× 63 / 327	−0.5
4	36,800	2499.7	− 2485	14.7	× 62 / 327	2.8
5	36,801	2447.9	− 2528	−80.1	× 61 / 327	−14.9
6	36,802	2406.9	− 2552	−145.1	× 51 / 327	−22.6
7	36,803	2501.1	− 2567	−65.9	× 59 / 327	−11.9
8	36,804	2481.5	− 2586	−104.5	× 31 / 327	−9.9
Sum, rounded to a whole point						−57

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −74, −67, −37, −71, −40, −86, −61, −49, −57 → −60.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 7 · 2016→2017: 30 · 2017→2018: 34 · 2018→2019: 31 · 2019→2022: 46 · 2022→2023: 25 · 2023→2024: 12 · 2024→2025: 8 → average 24.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 24.1 × 2.66 = 64.1. Upper limit 3.9, lower limit −124.3.

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.