Richland Union Elementary: math

The shaded band is this district'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	17,305	2369.9	− 2436	−66.1	× 400 / 2262	−11.7
4	17,308	2413.3	− 2485	−71.7	× 348 / 2262	−11
5	17,309	2438.4	− 2528	−89.6	× 378 / 2262	−15
6	17,312	2450.5	− 2552	−101.5	× 397 / 2262	−17.8
7	17,313	2465.5	− 2567	−101.5	× 380 / 2262	−17.1
8	17,316	2481.1	− 2586	−104.9	× 359 / 2262	−16.6
Sum, rounded to a whole point						−89

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,323	2403.6	− 2436	−32.4	× 303 / 2212	−4.4
4	16,325	2416.9	− 2485	−68.1	× 395 / 2212	−12.2
5	16,326	2445.0	− 2528	−83	× 358 / 2212	−13.4
6	16,329	2451.4	− 2552	−100.6	× 376 / 2212	−17.1
7	16,330	2465.7	− 2567	−101.3	× 399 / 2212	−18.3
8	16,333	2462.6	− 2586	−123.4	× 381 / 2212	−21.3
Sum, rounded to a whole point						−87

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,628	2401.3	− 2436	−34.7	× 414 / 2188	−6.6
4	16,630	2444.4	− 2485	−40.6	× 294 / 2188	−5.5
5	16,632	2443.8	− 2528	−84.2	× 389 / 2188	−15
6	16,634	2452.4	− 2552	−99.6	× 343 / 2188	−15.6
7	16,635	2459.6	− 2567	−107.4	× 366 / 2188	−18
8	16,638	2478.3	− 2586	−107.7	× 382 / 2188	−18.8
Sum, rounded to a whole point						−79

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,645	2401.2	− 2436	−34.8	× 311 / 2043	−5.3
4	16,647	2452.8	− 2485	−32.2	× 339 / 2043	−5.3
5	16,649	2453.2	− 2528	−74.8	× 293 / 2043	−10.7
6	16,650	2456.1	− 2552	−95.9	× 394 / 2043	−18.5
7	16,653	2475.9	− 2567	−91.1	× 343 / 2043	−15.3
8	16,655	2484.5	− 2586	−101.5	× 363 / 2043	−18
Sum, rounded to a whole point						−73

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,779	2408.4	− 2436	−27.6	× 289 / 1945	−4.1
4	16,780	2456.1	− 2485	−28.9	× 307 / 1945	−4.6
5	16,781	2469.2	− 2528	−58.8	× 337 / 1945	−10.2
6	16,782	2465.2	− 2552	−86.8	× 280 / 1945	−12.5
7	16,783	2480.9	− 2567	−86.1	× 389 / 1945	−17.2
8	16,784	2498.0	− 2586	−88	× 343 / 1945	−15.5
Sum, rounded to a whole point						−64

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,375	2346.5	− 2436	−89.5	× 260 / 1706	−13.6
4	16,376	2381.4	− 2485	−103.6	× 296 / 1706	−18
5	16,377	2414.8	− 2528	−113.2	× 293 / 1706	−19.4
6	16,378	2435.7	− 2552	−116.3	× 309 / 1706	−21.1
7	16,379	2462.8	− 2567	−104.2	× 303 / 1706	−18.5
8	16,380	2461.2	− 2586	−124.8	× 245 / 1706	−17.9
Sum, rounded to a whole point						−109

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,817	2372.3	− 2436	−63.7	× 286 / 1754	−10.4
4	16,818	2417.7	− 2485	−67.3	× 261 / 1754	−10
5	16,819	2422.7	− 2528	−105.3	× 305 / 1754	−18.3
6	16,820	2440.6	− 2552	−111.4	× 288 / 1754	−18.3
7	16,821	2443.4	− 2567	−123.6	× 299 / 1754	−21.1
8	16,822	2453.4	− 2586	−132.6	× 315 / 1754	−23.8
Sum, rounded to a whole point						−102

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,759	2379.8	− 2436	−56.2	× 280 / 1722	−9.1
4	16,760	2418.5	− 2485	−66.5	× 287 / 1722	−11.1
5	16,761	2444.3	− 2528	−83.7	× 263 / 1722	−12.8
6	16,762	2447.0	− 2552	−105	× 303 / 1722	−18.5
7	16,763	2445.6	− 2567	−121.4	× 290 / 1722	−20.4
8	16,764	2458.6	− 2586	−127.4	× 299 / 1722	−22.1
Sum, rounded to a whole point						−94

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,712	2409.2	− 2436	−26.8	× 257 / 1645	−4.2
4	16,713	2432.5	− 2485	−52.5	× 265 / 1645	−8.5
5	16,714	2448.6	− 2528	−79.4	× 286 / 1645	−13.8
6	16,715	2453.7	− 2552	−98.3	× 261 / 1645	−15.6
7	16,716	2452.2	− 2567	−114.8	× 294 / 1645	−20.5
8	16,717	2465.5	− 2586	−120.5	× 282 / 1645	−20.7
Sum, rounded to a whole point						−83

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,703	2396.9	− 2436	−39.1	× 227 / 1571	−5.6
4	16,704	2442.3	− 2485	−42.7	× 268 / 1571	−7.3
5	16,705	2447.9	− 2528	−80.1	× 254 / 1571	−13
6	16,706	2443.9	− 2552	−108.1	× 298 / 1571	−20.5
7	16,707	2473.8	− 2567	−93.2	× 253 / 1571	−15
8	16,708	2472.1	− 2586	−113.9	× 271 / 1571	−19.6
Sum, rounded to a whole point						−81

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,716	2400.7	− 2436	−35.3	× 253 / 1524	−5.9
4	16,717	2439.7	− 2485	−45.3	× 231 / 1524	−6.9
5	16,718	2450.4	− 2528	−77.6	× 256 / 1524	−13
6	16,719	2456.4	− 2552	−95.6	× 255 / 1524	−16
7	16,720	2464.7	− 2567	−102.3	× 284 / 1524	−19.1
8	16,721	2490.1	− 2586	−95.9	× 245 / 1524	−15.4
Sum, rounded to a whole point						−76

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −89, −87, −79, −73, −64, −109, −102, −94, −83, −81, −76 → −85.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 2 · 2016→2017: 8 · 2017→2018: 6 · 2018→2019: 9 · 2019→2021: 45 · 2021→2022: 7 · 2022→2023: 8 · 2023→2024: 11 · 2024→2025: 2 · 2025→2026: 5 → average 10.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.3 × 2.66 = 27.4. Upper limit −57.8, lower limit −112.6.

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 — for a district, the total across its schools. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.

Richland Union Elementary