Jamestown Elementary: english

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	102,544	2385.6	− 2432	−46.4	× 43 / 217	−9.2
4	102,545	2425.0	− 2473	−48	× 35 / 217	−7.7
5	102,548	2413.0	− 2502	−89	× 36 / 217	−14.8
6	102,549	2473.7	− 2531	−57.3	× 37 / 217	−9.8
7	102,552	2521.7	− 2552	−30.3	× 32 / 217	−4.5
8	102,553	2533.6	− 2567	−33.4	× 34 / 217	−5.2
Sum, rounded to a whole point						−51

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	95,258	2382.0	− 2432	−50	× 33 / 222	−7.4
4	95,259	2427.9	− 2473	−45.1	× 46 / 222	−9.3
5	95,262	2476.7	− 2502	−25.3	× 38 / 222	−4.3
6	95,263	2457.3	− 2531	−73.7	× 36 / 222	−12
7	95,266	2518.6	− 2552	−33.4	× 34 / 222	−5.1
8	95,268	2558.9	− 2567	−8.1	× 35 / 222	−1.3
Sum, rounded to a whole point						−39

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	98,032	2395.6	− 2432	−36.4	× 29 / 191	−5.5
4	98,034	2429.7	− 2473	−43.3	× 30 / 191	−6.8
5	98,036	2465.8	− 2502	−36.2	× 36 / 191	−6.8
6	98,039	2526.2	− 2531	−4.8	× 30 / 191	−0.8
7	98,041	2500.6	− 2552	−51.4	× 34 / 191	−9.1
8	98,042	2557.3	− 2567	−9.7	× 32 / 191	−1.6
Sum, rounded to a whole point						−31

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	98,214	2389.3	− 2432	−42.7	× 31 / 190	−7
4	98,215	2436.2	− 2473	−36.8	× 27 / 190	−5.2
5	98,218	2450.5	− 2502	−51.5	× 30 / 190	−8.1
6	98,219	2475.8	− 2531	−55.2	× 41 / 190	−11.9
7	98,222	2556.8	− 2552	4.8	× 34 / 190	0.9
8	98,223	2527.9	− 2567	−39.1	× 27 / 190	−5.6
Sum, rounded to a whole point						−37

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	98,876	2385.8	− 2432	−46.2	× 41 / 212	−8.9
4	98,877	2420.2	− 2473	−52.8	× 33 / 212	−8.2
5	98,878	2450.9	− 2502	−51.1	× 31 / 212	−7.5
6	98,879	2471.1	− 2531	−59.9	× 34 / 212	−9.6
7	98,880	2522.8	− 2552	−29.2	× 39 / 212	−5.4
8	98,881	2566.2	− 2567	−0.8	× 34 / 212	−0.1
Sum, rounded to a whole point						−40

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	96,713	2389.5	− 2432	−42.5	× 39 / 213	−7.8
4	96,714	2401.2	− 2473	−71.8	× 44 / 213	−14.8
5	96,715	2438.2	− 2502	−63.8	× 41 / 213	−12.3
6	96,716	2469.3	− 2531	−61.7	× 28 / 213	−8.1
7	96,717	2532.3	− 2552	−19.7	× 29 / 213	−2.7
8	96,718	2506.4	− 2567	−60.6	× 32 / 213	−9.1
Sum, rounded to a whole point						−55

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	99,065	2376.4	− 2432	−55.6	× 46 / 226	−11.3
4	99,066	2436.8	− 2473	−36.2	× 41 / 226	−6.6
5	99,067	2443.5	− 2502	−58.5	× 43 / 226	−11.1
6	99,068	2478.0	− 2531	−53	× 42 / 226	−9.8
7	99,069	2468.0	− 2552	−84	× 26 / 226	−9.7
8	99,070	2495.4	− 2567	−71.6	× 28 / 226	−8.9
Sum, rounded to a whole point						−57

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	98,898	2375.9	− 2432	−56.1	× 41 / 237	−9.7
4	98,899	2403.0	− 2473	−70	× 43 / 237	−12.7
5	98,900	2447.9	− 2502	−54.1	× 45 / 237	−10.3
6	98,901	2492.7	− 2531	−38.3	× 43 / 237	−6.9
7	98,902	2468.9	− 2552	−83.1	× 37 / 237	−13
8	98,903	2466.4	− 2567	−100.6	× 28 / 237	−11.9
Sum, rounded to a whole point						−64

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	98,804	2404.9	− 2432	−27.1	× 36 / 247	−3.9
4	98,805	2379.6	− 2473	−93.4	× 40 / 247	−15.1
5	98,806	2403.9	− 2502	−98.1	× 47 / 247	−18.7
6	98,807	2481.8	− 2531	−49.2	× 41 / 247	−8.2
7	98,808	2494.9	− 2552	−57.1	× 46 / 247	−10.6
8	98,809	2473.1	− 2567	−93.9	× 37 / 247	−14.1
Sum, rounded to a whole point						−71

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	98,510	2409.1	− 2432	−22.9	× 50 / 264	−4.3
4	98,511	2426.5	− 2473	−46.5	× 37 / 264	−6.5
5	98,512	2447.0	− 2502	−55	× 43 / 264	−9
6	98,513	2481.8	− 2531	−49.2	× 47 / 264	−8.8
7	98,514	2509.0	− 2552	−43	× 42 / 264	−6.8
8	98,515	2538.1	− 2567	−28.9	× 45 / 264	−4.9
Sum, rounded to a whole point						−40

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	98,168	2389.6	− 2432	−42.4	× 42 / 249	−7.2
4	98,169	2440.2	− 2473	−32.8	× 48 / 249	−6.3
5	98,170	2406.7	− 2502	−95.3	× 33 / 249	−12.6
6	98,171	2476.2	− 2531	−54.8	× 40 / 249	−8.8
7	98,172	2524.0	− 2552	−28	× 45 / 249	−5.1
8	98,173	2494.9	− 2567	−72.1	× 41 / 249	−11.9
Sum, rounded to a whole point						−52

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −51, −39, −31, −37, −40, −55, −57, −64, −71, −40, −52 → −48.8
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: 8 · 2017→2018: 6 · 2018→2019: 3 · 2019→2021: 15 · 2021→2022: 2 · 2022→2023: 7 · 2023→2024: 7 · 2024→2025: 31 · 2025→2026: 12 → 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 −21.4, lower limit −76.2.

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.

Jamestown Elementary