Reef-Sunset Unified: math

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	19,146	2360.5	− 2436	−75.5	× 225 / 1280	−13.3
4	19,149	2424.1	− 2485	−60.9	× 204 / 1280	−9.7
5	19,150	2419.9	− 2528	−108.1	× 189 / 1280	−16
6	19,153	2469.8	− 2552	−82.2	× 186 / 1280	−11.9
7	19,154	2464.1	− 2567	−102.9	× 158 / 1280	−12.7
8	19,157	2450.9	− 2586	−135.1	× 189 / 1280	−19.9
11	19,158	2465.1	− 2628	−162.9	× 129 / 1280	−16.4
Sum, rounded to a whole point						−100

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	18,158	2379.2	− 2436	−56.8	× 189 / 1310	−8.2
4	18,160	2412.4	− 2485	−72.6	× 221 / 1310	−12.2
5	18,162	2431.0	− 2528	−97	× 205 / 1310	−15.2
6	18,163	2427.8	− 2552	−124.2	× 187 / 1310	−17.7
7	18,165	2462.2	− 2567	−104.8	× 193 / 1310	−15.4
8	18,167	2464.0	− 2586	−122	× 162 / 1310	−15.1
11	18,170	2472.7	− 2628	−155.3	× 153 / 1310	−18.1
Sum, rounded to a whole point						−102

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	18,492	2364.7	− 2436	−71.3	× 231 / 1399	−11.8
4	18,493	2411.2	− 2485	−73.8	× 193 / 1399	−10.2
5	18,495	2423.3	− 2528	−104.7	× 225 / 1399	−16.8
6	18,497	2436.9	− 2552	−115.1	× 197 / 1399	−16.2
7	18,500	2444.2	− 2567	−122.8	× 189 / 1399	−16.6
8	18,502	2478.5	− 2586	−107.5	× 186 / 1399	−14.3
11	18,504	2455.5	− 2628	−172.5	× 178 / 1399	−21.9
Sum, rounded to a whole point						−108

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	18,525	2372.4	− 2436	−63.6	× 228 / 1425	−10.2
4	18,526	2405.1	− 2485	−79.9	× 233 / 1425	−13.1
5	18,529	2446.4	− 2528	−81.6	× 196 / 1425	−11.2
6	18,530	2433.8	− 2552	−118.2	× 225 / 1425	−18.7
7	18,533	2469.2	− 2567	−97.8	× 203 / 1425	−13.9
8	18,534	2478.0	− 2586	−108	× 184 / 1425	−13.9
11	18,537	2467.1	− 2628	−160.9	× 156 / 1425	−17.6
Sum, rounded to a whole point						−99

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	18,665	2374.8	− 2436	−61.2	× 223 / 1432	−9.5
4	18,666	2404.0	− 2485	−81	× 225 / 1432	−12.7
5	18,667	2443.3	− 2528	−84.7	× 239 / 1432	−14.1
6	18,668	2450.4	− 2552	−101.6	× 193 / 1432	−13.7
7	18,669	2453.7	− 2567	−113.3	× 227 / 1432	−18
8	18,670	2500.1	− 2586	−85.9	× 210 / 1432	−12.6
11	18,671	2492.8	− 2628	−135.2	× 115 / 1432	−10.9
Sum, rounded to a whole point						−92

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	18,210	2313.5	− 2436	−122.5	× 163 / 1185	−16.9
4	18,211	2357.3	− 2485	−127.7	× 185 / 1185	−19.9
5	18,212	2392.9	− 2528	−135.1	× 181 / 1185	−20.6
6	18,213	2406.5	− 2552	−145.5	× 171 / 1185	−21
7	18,214	2420.8	− 2567	−146.2	× 183 / 1185	−22.6
8	18,215	2417.8	− 2586	−168.2	× 174 / 1185	−24.7
11	18,216	2533.6	− 2628	−94.4	× 128 / 1185	−10.2
Sum, rounded to a whole point						−136

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	18,712	2354.3	− 2436	−81.7	× 204 / 1467	−11.4
4	18,713	2387.9	− 2485	−97.1	× 215 / 1467	−14.2
5	18,714	2408.4	− 2528	−119.6	× 205 / 1467	−16.7
6	18,715	2405.1	− 2552	−146.9	× 213 / 1467	−21.3
7	18,716	2438.3	− 2567	−128.7	× 213 / 1467	−18.7
8	18,717	2436.6	− 2586	−149.4	× 233 / 1467	−23.7
11	18,718	2477.2	− 2628	−150.8	× 184 / 1467	−18.9
Sum, rounded to a whole point						−125

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	18,655	2347.7	− 2436	−88.3	× 201 / 1432	−12.4
4	18,656	2392.8	− 2485	−92.2	× 203 / 1432	−13.1
5	18,657	2415.4	− 2528	−112.6	× 222 / 1432	−17.5
6	18,658	2400.2	− 2552	−151.8	× 197 / 1432	−20.9
7	18,659	2435.7	− 2567	−131.3	× 212 / 1432	−19.4
8	18,660	2437.5	− 2586	−148.5	× 206 / 1432	−21.4
11	18,661	2462.2	− 2628	−165.8	× 191 / 1432	−22.1
Sum, rounded to a whole point						−127

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	18,616	2346.2	− 2436	−89.8	× 193 / 1411	−12.3
4	18,617	2379.7	− 2485	−105.3	× 204 / 1411	−15.2
5	18,618	2413.3	− 2528	−114.7	× 201 / 1411	−16.3
6	18,619	2403.9	− 2552	−148.1	× 223 / 1411	−23.4
7	18,620	2421.1	− 2567	−145.9	× 204 / 1411	−21.1
8	18,621	2433.2	− 2586	−152.8	× 221 / 1411	−23.9
11	18,622	2457.8	− 2628	−170.2	× 165 / 1411	−19.9
Sum, rounded to a whole point						−132

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	18,612	2343.4	− 2436	−92.6	× 202 / 1392	−13.4
4	18,613	2389.1	− 2485	−95.9	× 194 / 1392	−13.4
5	18,614	2421.3	− 2528	−106.7	× 194 / 1392	−14.9
6	18,615	2405.8	− 2552	−146.2	× 194 / 1392	−20.4
7	18,616	2425.1	− 2567	−141.9	× 223 / 1392	−22.7
8	18,617	2438.7	− 2586	−147.3	× 198 / 1392	−21
11	18,618	2472.5	− 2628	−155.5	× 187 / 1392	−20.9
Sum, rounded to a whole point						−127

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	18,645	2351.1	− 2436	−84.9	× 181 / 1309	−11.7
4	18,646	2373.5	− 2485	−111.5	× 188 / 1309	−16
5	18,647	2410.3	− 2528	−117.7	× 185 / 1309	−16.6
6	18,648	2411.8	− 2552	−140.2	× 185 / 1309	−19.8
7	18,649	2436.0	− 2567	−131	× 187 / 1309	−18.7
8	18,650	2436.7	− 2586	−149.3	× 220 / 1309	−25.1
11	18,651	2453.8	− 2628	−174.2	× 163 / 1309	−21.7
Sum, rounded to a whole point						−130

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −100, −102, −108, −99, −92, −136, −125, −127, −132, −127, −130 → −116.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 2 · 2016→2017: 6 · 2017→2018: 9 · 2018→2019: 7 · 2019→2021: 44 · 2021→2022: 11 · 2022→2023: 2 · 2023→2024: 5 · 2024→2025: 5 · 2025→2026: 3 → average 9.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.4 × 2.66 = 25. Upper limit −91.2, lower limit −141.2.

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 — 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.

Reef-Sunset Unified