Castaic Union: 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	22,008	2445.7	− 2432	13.7	× 312 / 1798	2.4
4	22,010	2476.1	− 2473	3.1	× 274 / 1798	0.5
5	22,012	2516.4	− 2502	14.4	× 290 / 1798	2.3
6	22,014	2538.5	− 2531	7.5	× 305 / 1798	1.3
7	22,016	2563.7	− 2552	11.7	× 294 / 1798	1.9
8	22,018	2566.3	− 2567	−0.7	× 323 / 1798	−0.1
Sum, rounded to a whole point						8

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	20,760	2429.4	− 2432	−2.6	× 228 / 1670	−0.4
4	20,763	2490.3	− 2473	17.3	× 294 / 1670	3
5	20,764	2508.9	− 2502	6.9	× 274 / 1670	1.1
6	20,766	2540.1	− 2531	9.1	× 286 / 1670	1.6
7	20,769	2573.3	− 2552	21.3	× 295 / 1670	3.8
8	20,770	2581.3	− 2567	14.3	× 293 / 1670	2.5
Sum, rounded to a whole point						12

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,123	2429.8	− 2432	−2.2	× 188 / 1544	−0.3
4	21,125	2489.3	− 2473	16.3	× 227 / 1544	2.4
5	21,126	2518.1	− 2502	16.1	× 292 / 1544	3
6	21,129	2546.7	− 2531	15.7	× 262 / 1544	2.7
7	21,131	2582.3	− 2552	30.3	× 289 / 1544	5.7
8	21,132	2592.8	− 2567	25.8	× 286 / 1544	4.8
Sum, rounded to a whole point						18

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,099	2436.7	− 2432	4.7	× 214 / 1457	0.7
4	21,101	2500.4	− 2473	27.4	× 187 / 1457	3.5
5	21,103	2513.7	− 2502	11.7	× 224 / 1457	1.8
6	21,105	2548.6	− 2531	17.6	× 300 / 1457	3.6
7	21,107	2567.2	− 2552	15.2	× 251 / 1457	2.6
8	21,109	2587.4	− 2567	20.4	× 281 / 1457	3.9
Sum, rounded to a whole point						16

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,269	2439.4	− 2432	7.4	× 182 / 1341	1
4	21,270	2487.0	− 2473	14	× 213 / 1341	2.2
5	21,271	2531.2	− 2502	29.2	× 185 / 1341	4
6	21,272	2550.3	− 2531	19.3	× 240 / 1341	3.5
7	21,273	2586.3	− 2552	34.3	× 285 / 1341	7.3
8	21,274	2586.6	− 2567	19.6	× 236 / 1341	3.4
Sum, rounded to a whole point						21

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,246	2443.8	− 2432	11.8	× 168 / 1165	1.7
4	21,247	2477.0	− 2473	4	× 196 / 1165	0.7
5	21,248	2513.9	− 2502	11.9	× 204 / 1165	2.1
6	21,249	2545.2	− 2531	14.2	× 200 / 1165	2.4
7	21,250	2556.3	− 2552	4.3	× 209 / 1165	0.8
8	21,251	2579.2	− 2567	12.2	× 188 / 1165	2
Sum, rounded to a whole point						10

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,217	2426.0	− 2432	−6	× 196 / 1198	−1
4	21,218	2481.3	− 2473	8.3	× 183 / 1198	1.3
5	21,219	2523.7	− 2502	21.7	× 206 / 1198	3.7
6	21,220	2539.2	− 2531	8.2	× 210 / 1198	1.4
7	21,221	2570.3	− 2552	18.3	× 196 / 1198	3
8	21,222	2576.1	− 2567	9.1	× 207 / 1198	1.6
Sum, rounded to a whole point						10

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,085	2428.7	− 2432	−3.3	× 185 / 1207	−0.5
4	21,086	2477.4	− 2473	4.4	× 194 / 1207	0.7
5	21,087	2506.8	− 2502	4.8	× 186 / 1207	0.7
6	21,088	2549.1	− 2531	18.1	× 215 / 1207	3.2
7	21,089	2534.4	− 2552	−17.6	× 228 / 1207	−3.3
8	21,090	2577.0	− 2567	10	× 199 / 1207	1.6
Sum, rounded to a whole point						2

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,000	2443.8	− 2432	11.8	× 206 / 1232	2
4	21,001	2469.1	− 2473	−3.9	× 199 / 1232	−0.6
5	21,002	2506.2	− 2502	4.2	× 195 / 1232	0.7
6	21,003	2558.8	− 2531	27.8	× 193 / 1232	4.4
7	21,004	2572.5	− 2552	20.5	× 219 / 1232	3.6
8	21,005	2589.0	− 2567	22	× 220 / 1232	3.9
Sum, rounded to a whole point						14

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	21,052	2437.7	− 2432	5.7	× 177 / 1196	0.8
4	21,053	2482.5	− 2473	9.5	× 205 / 1196	1.6
5	21,054	2512.9	− 2502	10.9	× 196 / 1196	1.8
6	21,055	2549.2	− 2531	18.2	× 206 / 1196	3.1
7	21,056	2589.6	− 2552	37.6	× 199 / 1196	6.3
8	21,057	2593.0	− 2567	26	× 213 / 1196	4.6
Sum, rounded to a whole point						18

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 8, 12, 18, 16, 21, 10, 10, 2, 14, 18 → 12.9
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 4 · 2016→2017: 6 · 2017→2018: 2 · 2018→2019: 5 · 2019→2022: 11 · 2022→2023: 0 · 2023→2024: 8 · 2024→2025: 12 · 2025→2026: 4 → average 5.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 5.8 × 2.66 = 15.4. Upper limit 28.3, lower limit −2.5.

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.

Schools in Castaic Union

Elementary schools

Middle schools

Castaic Middle