Westlake 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	62,930	2427.1	− 2432	−4.9	× 104 / 328	−1.6
4	62,933	2491.8	− 2473	18.8	× 112 / 328	6.4
5	62,934	2546.0	− 2502	44	× 112 / 328	15
Sum, rounded to a whole point						20

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,374	2456.3	− 2432	24.3	× 109 / 327	8.1
4	58,376	2499.6	− 2473	26.6	× 106 / 327	8.6
5	58,377	2526.0	− 2502	24	× 112 / 327	8.2
Sum, rounded to a whole point						25

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,061	2425.3	− 2432	−6.7	× 107 / 579	−1.2
4	60,063	2495.4	− 2473	22.4	× 111 / 579	4.3
5	60,065	2515.4	− 2502	13.4	× 105 / 579	2.4
6	60,066	2557.8	− 2531	26.8	× 86 / 579	4
7	60,068	2593.0	− 2552	41	× 88 / 579	6.2
8	60,071	2557.8	− 2567	−9.2	× 82 / 579	−1.3
Sum, rounded to a whole point						14

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,176	2451.6	− 2432	19.6	× 110 / 584	3.7
4	60,177	2512.4	− 2473	39.4	× 107 / 584	7.2
5	60,180	2526.0	− 2502	24	× 112 / 584	4.6
6	60,181	2538.9	− 2531	7.9	× 85 / 584	1.1
7	60,184	2583.5	− 2552	31.5	× 87 / 584	4.7
8	60,185	2597.5	− 2567	30.5	× 83 / 584	4.3
Sum, rounded to a whole point						26

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,418	2430.5	− 2432	−1.5	× 107 / 603	−0.3
4	60,419	2501.4	− 2473	28.4	× 111 / 603	5.2
5	60,420	2535.3	− 2502	33.3	× 110 / 603	6.1
6	60,421	2560.4	− 2531	29.4	× 108 / 603	5.3
7	60,422	2578.9	− 2552	26.9	× 82 / 603	3.7
8	60,423	2594.1	− 2567	27.1	× 85 / 603	3.8
Sum, rounded to a whole point						24

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,488	2434.9	− 2432	2.9	× 110 / 662	0.5
4	60,489	2493.0	− 2473	20	× 111 / 662	3.4
5	60,490	2531.7	− 2502	29.7	× 111 / 662	5
6	60,491	2524.9	− 2531	−6.1	× 109 / 662	−1
7	60,492	2600.2	− 2552	48.2	× 111 / 662	8.1
8	60,493	2567.7	− 2567	0.7	× 110 / 662	0.1
Sum, rounded to a whole point						16

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,439	2414.9	− 2432	−17.1	× 108 / 662	−2.8
4	60,440	2480.4	− 2473	7.4	× 111 / 662	1.2
5	60,441	2551.7	− 2502	49.7	× 110 / 662	8.3
6	60,442	2535.1	− 2531	4.1	× 111 / 662	0.7
7	60,443	2561.1	− 2552	9.1	× 112 / 662	1.5
8	60,444	2595.4	− 2567	28.4	× 110 / 662	4.7
Sum, rounded to a whole point						14

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,382	2408.9	− 2432	−23.1	× 110 / 785	−3.2
4	60,383	2467.3	− 2473	−5.7	× 109 / 785	−0.8
5	60,384	2535.5	− 2502	33.5	× 111 / 785	4.7
6	60,385	2560.9	− 2531	29.9	× 110 / 785	4.2
7	60,386	2585.9	− 2552	33.9	× 110 / 785	4.8
8	60,387	2569.8	− 2567	2.8	× 112 / 785	0.4
11	60,388	2638.6	− 2583	55.6	× 123 / 785	8.7
Sum, rounded to a whole point						19

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,141	2400.3	− 2432	−31.7	× 104 / 751	−4.4
4	60,142	2461.9	− 2473	−11.1	× 112 / 751	−1.7
5	60,143	2513.9	− 2502	11.9	× 111 / 751	1.8
6	60,144	2528.1	− 2531	−2.9	× 111 / 751	−0.4
7	60,145	2595.0	− 2552	43	× 108 / 751	6.2
8	60,146	2595.7	− 2567	28.7	× 110 / 751	4.2
11	60,147	2615.7	− 2583	32.7	× 95 / 751	4.1
Sum, rounded to a whole point						10

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 20, 25, 14, 26, 24, 16, 14, 19, 10 → 18.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 5 · 2016→2017: 11 · 2017→2018: 12 · 2018→2019: 2 · 2019→2022: 8 · 2022→2023: 2 · 2023→2024: 5 · 2024→2025: 9 → average 6.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.8 × 2.66 = 18.1. Upper limit 36.8, lower limit 0.6.

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