Slvusd 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	90,333	2374.6	− 2432	−57.4	× 10 / 175	−3.3
4	90,336	2476.8	− 2473	3.8	× 15 / 175	0.3
5	90,337	2451.0	− 2502	−51	× 18 / 175	−5.2
6	90,340	2561.4	− 2531	30.4	× 44 / 175	7.6
7	90,341	2608.4	− 2552	56.4	× 38 / 175	12.2
8	90,344	2608.8	− 2567	41.8	× 29 / 175	6.9
11	90,345	2615.6	− 2583	32.6	× 21 / 175	3.9
Sum, rounded to a whole point						23

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,810	2388.0	− 2432	−44	× 14 / 171	−3.6
4	83,811	2424.1	− 2473	−48.9	× 12 / 171	−3.4
5	83,814	2510.5	− 2502	8.5	× 16 / 171	0.8
6	83,816	2555.5	− 2531	24.5	× 38 / 171	5.4
7	83,817	2595.1	− 2552	43.1	× 38 / 171	9.6
8	83,819	2616.5	− 2567	49.5	× 40 / 171	11.6
11	83,821	2635.5	− 2583	52.5	× 13 / 171	4
Sum, rounded to a whole point						24

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,125	2380.6	− 2432	−51.4	× 17 / 170	−5.1
4	86,127	2428.0	− 2473	−45	× 12 / 170	−3.2
6	86,131	2562.1	− 2531	31.1	× 49 / 170	9
7	86,133	2567.4	− 2552	15.4	× 37 / 170	3.4
8	86,136	2605.4	− 2567	38.4	× 41 / 170	9.3
11	86,137	2605.6	− 2583	22.6	× 14 / 170	1.9
Sum, rounded to a whole point						15

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,358	2427.4	− 2432	−4.6	× 12 / 171	−0.3
4	86,359	2454.7	− 2473	−18.3	× 15 / 171	−1.6
6	86,363	2551.5	− 2531	20.5	× 38 / 171	4.6
7	86,366	2605.9	− 2552	53.9	× 52 / 171	16.4
8	86,367	2592.5	− 2567	25.5	× 39 / 171	5.8
11	86,370	2693.2	− 2583	110.2	× 15 / 171	9.7
Sum, rounded to a whole point						35

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,949	2465.6	− 2432	33.6	× 12 / 200	2
4	86,950	2459.8	− 2473	−13.2	× 11 / 200	−0.7
5	86,951	2482.7	− 2502	−19.3	× 16 / 200	−1.5
6	86,952	2538.4	− 2531	7.4	× 48 / 200	1.8
7	86,953	2589.1	− 2552	37.1	× 45 / 200	8.3
8	86,954	2613.7	− 2567	46.7	× 50 / 200	11.7
11	86,955	2664.8	− 2583	81.8	× 18 / 200	7.4
Sum, rounded to a whole point						29

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,218	2446.5	− 2432	14.5	× 18 / 199	1.3
4	87,219	2518.9	− 2473	45.9	× 13 / 199	3
5	87,220	2506.7	− 2502	4.7	× 15 / 199	0.4
6	87,221	2557.5	− 2531	26.5	× 44 / 199	5.9
7	87,222	2614.2	− 2552	62.2	× 43 / 199	13.4
8	87,223	2609.1	− 2567	42.1	× 46 / 199	9.7
11	87,224	2632.2	− 2583	49.2	× 20 / 199	4.9
Sum, rounded to a whole point						39

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,142	2411.8	− 2432	−20.2	× 16 / 177	−1.8
4	87,143	2505.4	− 2473	32.4	× 13 / 177	2.4
6	87,145	2554.4	− 2531	23.4	× 37 / 177	4.9
7	87,146	2568.7	− 2552	16.7	× 44 / 177	4.2
8	87,147	2612.6	− 2567	45.6	× 45 / 177	11.6
11	87,148	2636.5	− 2583	53.5	× 22 / 177	6.6
Sum, rounded to a whole point						28

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,114	2426.6	− 2432	−5.4	× 15 / 186	−0.4
4	87,115	2412.7	− 2473	−60.3	× 16 / 186	−5.2
5	87,116	2542.4	− 2502	40.4	× 12 / 186	2.6
6	87,117	2570.9	− 2531	39.9	× 39 / 186	8.4
7	87,118	2575.5	− 2552	23.5	× 37 / 186	4.7
8	87,119	2575.0	− 2567	8	× 42 / 186	1.8
11	87,120	2615.7	− 2583	32.7	× 25 / 186	4.4
Sum, rounded to a whole point						16

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,796	2419.8	− 2432	−12.2	× 13 / 199	−0.8
4	86,797	2502.8	− 2473	29.8	× 17 / 199	2.5
5	86,798	2451.4	− 2502	−50.6	× 15 / 199	−3.8
6	86,799	2560.6	− 2531	29.6	× 37 / 199	5.5
7	86,800	2597.6	− 2552	45.6	× 48 / 199	11
8	86,801	2582.1	− 2567	15.1	× 35 / 199	2.7
11	86,802	2655.1	− 2583	72.1	× 34 / 199	12.3
Sum, rounded to a whole point						29

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 23, 24, 15, 35, 29, 39, 28, 16, 29 → 26.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 1 · 2016→2017: 9 · 2017→2018: 20 · 2018→2019: 6 · 2019→2022: 10 · 2022→2023: 11 · 2023→2024: 12 · 2024→2025: 13 → 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 53.8, lower limit −1.

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.