Linscott 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	90,164	2375.7	− 2432	−56.3	× 48 / 195	−13.9
4	90,165	2430.7	− 2473	−42.3	× 30 / 195	−6.5
5	90,168	2490.6	− 2502	−11.4	× 29 / 195	−1.7
6	90,169	2563.5	− 2531	32.5	× 30 / 195	5
7	90,172	2529.0	− 2552	−23	× 30 / 195	−3.5
8	90,173	2576.0	− 2567	9	× 28 / 195	1.3
Sum, rounded to a whole point						−19

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,642	2419.4	− 2432	−12.6	× 28 / 189	−1.9
4	83,643	2407.0	− 2473	−66	× 49 / 189	−17.1
5	83,646	2470.2	− 2502	−31.8	× 29 / 189	−4.9
6	83,647	2567.3	− 2531	36.3	× 30 / 189	5.8
7	83,650	2578.5	− 2552	26.5	× 30 / 189	4.2
8	83,652	2615.2	− 2567	48.2	× 23 / 189	5.9
Sum, rounded to a whole point						−8

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	85,958	2407.4	− 2432	−24.6	× 29 / 193	−3.7
4	85,959	2439.5	− 2473	−33.5	× 29 / 193	−5
5	85,962	2450.4	− 2502	−51.6	× 49 / 193	−13.1
6	85,963	2550.4	− 2531	19.4	× 30 / 193	3
7	85,965	2563.6	− 2552	11.6	× 28 / 193	1.7
8	85,967	2576.9	− 2567	9.9	× 28 / 193	1.4
Sum, rounded to a whole point						−16

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,188	2421.8	− 2432	−10.2	× 27 / 192	−1.4
4	86,191	2439.5	− 2473	−33.5	× 29 / 192	−5.1
5	86,192	2491.6	− 2502	−10.4	× 29 / 192	−1.6
6	86,195	2526.7	− 2531	−4.3	× 49 / 192	−1.1
7	86,196	2561.1	− 2552	9.1	× 28 / 192	1.3
8	86,199	2591.9	− 2567	24.9	× 30 / 192	3.9
Sum, rounded to a whole point						−4

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,781	2419.7	− 2432	−12.3	× 27 / 179	−1.9
4	86,782	2429.4	− 2473	−43.6	× 30 / 179	−7.3
5	86,783	2498.6	− 2502	−3.4	× 30 / 179	−0.6
6	86,784	2545.4	− 2531	14.4	× 30 / 179	2.4
7	86,785	2539.4	− 2552	−12.6	× 33 / 179	−2.3
8	86,786	2566.5	− 2567	−0.5	× 29 / 179	−0.1
Sum, rounded to a whole point						−10

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,050	2400.4	− 2432	−31.6	× 29 / 170	−5.4
4	87,051	2441.9	− 2473	−31.1	× 30 / 170	−5.5
5	87,052	2531.3	− 2502	29.3	× 30 / 170	5.2
6	87,053	2590.7	− 2531	59.7	× 29 / 170	10.2
7	87,054	2543.4	− 2552	−8.6	× 30 / 170	−1.5
8	87,055	2595.4	− 2567	28.4	× 22 / 170	3.7
Sum, rounded to a whole point						7

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,974	2409.0	− 2432	−23	× 28 / 174	−3.7
4	86,975	2439.1	− 2473	−33.9	× 28 / 174	−5.5
5	86,976	2500.6	− 2502	−1.4	× 30 / 174	−0.2
6	86,977	2584.1	− 2531	53.1	× 30 / 174	9.2
7	86,978	2601.1	− 2552	49.1	× 29 / 174	8.2
8	86,979	2551.9	− 2567	−15.1	× 29 / 174	−2.5
Sum, rounded to a whole point						5

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,946	2442.7	− 2432	10.7	× 28 / 175	1.7
4	86,947	2428.1	− 2473	−44.9	× 30 / 175	−7.7
5	86,948	2506.4	− 2502	4.4	× 28 / 175	0.7
6	86,949	2577.3	− 2531	46.3	× 30 / 175	7.9
7	86,950	2556.2	− 2552	4.2	× 30 / 175	0.7
8	86,951	2586.7	− 2567	19.7	× 29 / 175	3.3
Sum, rounded to a whole point						7

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,628	2397.3	− 2432	−34.7	× 27 / 173	−5.4
4	86,629	2475.2	− 2473	2.2	× 28 / 173	0.4
5	86,630	2506.7	− 2502	4.7	× 30 / 173	0.8
6	86,631	2563.1	− 2531	32.1	× 28 / 173	5.2
7	86,632	2586.2	− 2552	34.2	× 30 / 173	5.9
8	86,633	2580.7	− 2567	13.7	× 30 / 173	2.4
Sum, rounded to a whole point						9

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −19, −8, −16, −4, −10, 7, 5, 7, 9 → −3.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 11 · 2016→2017: 8 · 2017→2018: 12 · 2018→2019: 6 · 2019→2022: 17 · 2022→2023: 2 · 2023→2024: 2 · 2024→2025: 2 → average 7.5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7.5 × 2.66 = 20. Upper limit 16.8, lower limit −23.2.

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. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.