Sherman Thomas Charter: english

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	41,236	2397.0	− 2432	−35	× 19 / 138	−4.8
4	41,237	2431.7	− 2473	−41.3	× 24 / 138	−7.2
5	41,240	2472.7	− 2502	−29.3	× 26 / 138	−5.5
6	41,241	2505.0	− 2531	−26	× 22 / 138	−4.1
7	41,244	2530.6	− 2552	−21.4	× 25 / 138	−3.9
8	41,245	2569.1	− 2567	2.1	× 22 / 138	0.3
Sum, rounded to a whole point						−25

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	38,141	2394.4	− 2432	−37.6	× 22 / 138	−6
4	38,143	2455.6	− 2473	−17.4	× 20 / 138	−2.5
5	38,145	2487.9	− 2502	−14.1	× 24 / 138	−2.5
6	38,146	2514.4	− 2531	−16.6	× 26 / 138	−3.1
7	38,148	2564.9	− 2552	12.9	× 19 / 138	1.8
8	38,151	2582.4	− 2567	15.4	× 27 / 138	3
Sum, rounded to a whole point						−9

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,047	2393.6	− 2432	−38.4	× 25 / 135	−7.1
4	39,049	2397.5	− 2473	−75.5	× 18 / 135	−10.1
5	39,050	2511.9	− 2502	9.9	× 24 / 135	1.8
6	39,053	2505.1	− 2531	−25.9	× 24 / 135	−4.6
7	39,055	2546.0	− 2552	−6	× 26 / 135	−1.2
8	39,056	2596.2	− 2567	29.2	× 18 / 135	3.9
Sum, rounded to a whole point						−17

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,067	2432.6	− 2432	0.6	× 22 / 139	0.1
4	39,069	2466.8	− 2473	−6.2	× 27 / 139	−1.2
5	39,071	2461.9	− 2502	−40.1	× 25 / 139	−7.2
6	39,074	2477.6	− 2531	−53.4	× 24 / 139	−9.2
7	39,075	2552.2	− 2552	0.2	× 20 / 139	0
8	39,078	2548.3	− 2567	−18.7	× 21 / 139	−2.8
Sum, rounded to a whole point						−20

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,207	2406.3	− 2432	−25.7	× 23 / 137	−4.3
4	39,208	2433.1	− 2473	−39.9	× 24 / 137	−7
5	39,209	2472.1	− 2502	−29.9	× 25 / 137	−5.5
6	39,210	2516.9	− 2531	−14.1	× 23 / 137	−2.4
7	39,211	2519.2	− 2552	−32.8	× 25 / 137	−6
8	39,212	2513.7	− 2567	−53.3	× 17 / 137	−6.6
Sum, rounded to a whole point						−32

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	38,970	2353.6	− 2432	−78.4	× 25 / 136	−14.4
4	38,971	2389.0	− 2473	−84	× 22 / 136	−13.6
5	38,972	2430.1	− 2502	−71.9	× 24 / 136	−12.7
6	38,973	2519.6	− 2531	−11.4	× 21 / 136	−1.8
7	38,974	2535.3	− 2552	−16.7	× 24 / 136	−2.9
8	38,975	2537.1	− 2567	−29.9	× 20 / 136	−4.4
Sum, rounded to a whole point						−50

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,023	2377.8	− 2432	−54.2	× 23 / 144	−8.7
4	39,024	2408.2	− 2473	−64.8	× 26 / 144	−11.7
5	39,025	2460.7	− 2502	−41.3	× 25 / 144	−7.2
6	39,026	2433.2	− 2531	−97.8	× 25 / 144	−17
7	39,027	2532.6	− 2552	−19.4	× 25 / 144	−3.4
8	39,028	2552.3	− 2567	−14.7	× 20 / 144	−2
Sum, rounded to a whole point						−50

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	38,851	2418.0	− 2432	−14	× 21 / 135	−2.2
4	38,852	2434.4	− 2473	−38.6	× 24 / 135	−6.9
5	38,853	2397.7	− 2502	−104.3	× 26 / 135	−20.1
6	38,854	2467.6	− 2531	−63.4	× 18 / 135	−8.5
7	38,855	2487.9	− 2552	−64.1	× 23 / 135	−10.9
8	38,856	2550.0	− 2567	−17	× 23 / 135	−2.9
Sum, rounded to a whole point						−51

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	38,622	2397.5	− 2432	−34.5	× 20 / 143	−4.8
4	38,623	2423.1	− 2473	−49.9	× 24 / 143	−8.4
5	38,624	2470.2	− 2502	−31.8	× 27 / 143	−6
6	38,625	2427.1	− 2531	−103.9	× 20 / 143	−14.5
7	38,626	2479.4	− 2552	−72.6	× 26 / 143	−13.2
8	38,627	2514.1	− 2567	−52.9	× 26 / 143	−9.6
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. −25, −9, −17, −20, −32, −50, −50, −51, −57 → −34.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 16 · 2016→2017: 8 · 2017→2018: 3 · 2018→2019: 12 · 2019→2022: 18 · 2022→2023: 0 · 2023→2024: 1 · 2024→2025: 6 → average 8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8 × 2.66 = 21.3. Upper limit −13.3, lower limit −55.9.

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.