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	83,573	2396.4	− 2436	−39.6	× 83 / 369	−8.9
4	83,574	2466.8	− 2485	−18.2	× 60 / 369	−3
5	83,577	2451.5	− 2528	−76.5	× 53 / 369	−11
6	83,578	2474.3	− 2552	−77.7	× 80 / 369	−16.8
7	83,581	2490.0	− 2567	−77	× 49 / 369	−10.2
8	83,582	2529.6	− 2586	−56.4	× 44 / 369	−6.7
Sum, rounded to a whole point						−57

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,512	2420.9	− 2436	−15.1	× 78 / 402	−2.9
4	77,514	2442.5	− 2485	−42.5	× 73 / 402	−7.7
5	77,516	2474.1	− 2528	−53.9	× 61 / 402	−8.2
6	77,518	2470.0	− 2552	−82	× 60 / 402	−12.2
7	77,520	2536.9	− 2567	−30.1	× 77 / 402	−5.8
8	77,522	2526.4	− 2586	−59.6	× 53 / 402	−7.9
Sum, rounded to a whole point						−45

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,649	2415.7	− 2436	−20.3	× 48 / 394	−2.5
4	79,652	2440.2	− 2485	−44.8	× 70 / 394	−8
5	79,654	2470.9	− 2528	−57.1	× 74 / 394	−10.7
6	79,656	2463.5	− 2552	−88.5	× 61 / 394	−13.7
7	79,658	2521.2	− 2567	−45.8	× 59 / 394	−6.9
8	79,660	2546.3	− 2586	−39.7	× 82 / 394	−8.3
Sum, rounded to a whole point						−50

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,786	2432.2	− 2436	−3.8	× 58 / 346	−0.6
4	79,789	2476.1	− 2485	−8.9	× 47 / 346	−1.2
5	79,790	2498.3	− 2528	−29.7	× 58 / 346	−5
6	79,793	2469.7	− 2552	−82.3	× 72 / 346	−17.1
7	79,794	2551.4	− 2567	−15.6	× 54 / 346	−2.4
8	79,797	2517.2	− 2586	−68.8	× 57 / 346	−11.3
Sum, rounded to a whole point						−38

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,291	2440.1	− 2436	4.1	× 56 / 353	0.7
4	80,292	2473.1	− 2485	−11.9	× 59 / 353	−2
5	80,293	2489.4	− 2528	−38.6	× 53 / 353	−5.8
6	80,294	2473.3	− 2552	−78.7	× 58 / 353	−12.9
7	80,295	2524.1	− 2567	−42.9	× 73 / 353	−8.9
8	80,296	2535.9	− 2586	−50.1	× 54 / 353	−7.7
Sum, rounded to a whole point						−37

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,521	2383.9	− 2436	−52.1	× 61 / 429	−7.4
4	80,522	2427.0	− 2485	−58	× 74 / 429	−10
5	80,523	2415.8	− 2528	−112.2	× 85 / 429	−22.2
6	80,524	2430.8	− 2552	−121.2	× 74 / 429	−20.9
7	80,525	2490.2	− 2567	−76.8	× 73 / 429	−13.1
8	80,526	2486.0	− 2586	−100	× 62 / 429	−14.5
Sum, rounded to a whole point						−88

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,487	2385.4	− 2436	−50.6	× 79 / 336	−11.9
4	80,488	2393.5	− 2485	−91.5	× 58 / 336	−15.8
5	80,489	2396.8	− 2528	−131.2	× 66 / 336	−25.8
7	80,491	2435.2	− 2567	−131.8	× 63 / 336	−24.7
8	80,492	2485.8	− 2586	−100.2	× 70 / 336	−20.9
Sum, rounded to a whole point						−99

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,503	2404.3	− 2436	−31.7	× 57 / 250	−7.2
4	80,504	2417.5	− 2485	−67.5	× 74 / 250	−20
5	80,505	2408.8	− 2528	−119.2	× 55 / 250	−26.2
8	80,506	2424.8	− 2586	−161.2	× 64 / 250	−41.3
Sum, rounded to a whole point						−95

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,160	2366.9	− 2436	−69.1	× 64 / 199	−22.2
4	80,161	2443.4	− 2485	−41.6	× 63 / 199	−13.2
5	80,162	2430.6	− 2528	−97.4	× 72 / 199	−35.2
Sum, rounded to a whole point						−71

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −57, −45, −50, −38, −37, −88, −99, −95, −71 → −64.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 12 · 2016→2017: 5 · 2017→2018: 12 · 2018→2019: 1 · 2019→2022: 51 · 2022→2023: 11 · 2023→2024: 4 · 2024→2025: 24 → average 15
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 15 × 2.66 = 39.9. Upper limit −24.5, lower limit −104.3.

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.