Avalon K-12: math · Schoolio

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	25,680	2411.2	− 2436	−24.8	× 61 / 324	−4.7
4	25,682	2424.4	− 2485	−60.6	× 41 / 324	−7.7
5	25,684	2457.9	− 2528	−70.1	× 44 / 324	−9.5
6	25,686	2493.7	− 2552	−58.3	× 46 / 324	−8.3
7	25,688	2520.8	− 2567	−46.2	× 42 / 324	−6
8	25,690	2517.0	− 2586	−69	× 44 / 324	−9.4
11	25,692	2585.6	− 2628	−42.4	× 46 / 324	−6
Sum, rounded to a whole point						−52

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,922	2423.8	− 2436	−12.2	× 46 / 315	−1.8
4	23,924	2459.4	− 2485	−25.6	× 52 / 315	−4.2
5	23,926	2436.9	− 2528	−91.1	× 38 / 315	−11
6	23,927	2509.7	− 2552	−42.3	× 43 / 315	−5.8
7	23,929	2513.5	− 2567	−53.5	× 44 / 315	−7.5
8	23,932	2534.0	− 2586	−52	× 40 / 315	−6.6
11	23,933	2595.2	− 2628	−32.8	× 52 / 315	−5.4
Sum, rounded to a whole point						−42

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,420	2421.9	− 2436	−14.1	× 37 / 296	−1.8
4	24,423	2453.9	− 2485	−31.1	× 41 / 296	−4.3
5	24,425	2461.3	− 2528	−66.7	× 50 / 296	−11.3
6	24,427	2468.8	− 2552	−83.2	× 38 / 296	−10.7
7	24,429	2504.9	− 2567	−62.1	× 40 / 296	−8.4
8	24,431	2504.8	− 2586	−81.2	× 46 / 296	−12.6
11	24,432	2543.4	− 2628	−84.6	× 44 / 296	−12.6
Sum, rounded to a whole point						−62

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,444	2410.0	− 2436	−26	× 45 / 276	−4.2
4	24,445	2439.2	− 2485	−45.8	× 41 / 276	−6.8
5	24,447	2476.6	− 2528	−51.4	× 43 / 276	−8
6	24,449	2500.5	− 2552	−51.5	× 48 / 276	−9
7	24,452	2448.4	− 2567	−118.6	× 38 / 276	−16.3
8	24,453	2505.0	− 2586	−81	× 40 / 276	−11.7
11	24,455	2433.5	− 2628	−194.5	× 21 / 276	−14.8
Sum, rounded to a whole point						−71

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,617	2409.3	− 2436	−26.7	× 47 / 284	−4.4
4	24,618	2441.1	− 2485	−43.9	× 45 / 284	−7
5	24,619	2420.1	− 2528	−107.9	× 37 / 284	−14.1
6	24,620	2494.3	− 2552	−57.7	× 37 / 284	−7.5
7	24,621	2486.7	− 2567	−80.3	× 47 / 284	−13.3
8	24,622	2482.3	− 2586	−103.7	× 37 / 284	−13.5
11	24,623	2562.2	− 2628	−65.8	× 34 / 284	−7.9
Sum, rounded to a whole point						−68

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,896	2400.4	− 2436	−35.6	× 40 / 240	−5.9
4	23,897	2445.7	− 2485	−39.3	× 28 / 240	−4.6
5	23,898	2432.6	− 2528	−95.4	× 36 / 240	−14.3
6	23,899	2456.7	− 2552	−95.3	× 39 / 240	−15.5
7	23,900	2455.8	− 2567	−111.2	× 36 / 240	−16.7
8	23,901	2488.4	− 2586	−97.6	× 30 / 240	−12.2
11	23,902	2521.1	− 2628	−106.9	× 31 / 240	−13.8
Sum, rounded to a whole point						−83

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,576	2380.8	− 2436	−55.2	× 32 / 250	−7.1
4	24,577	2428.4	− 2485	−56.6	× 38 / 250	−8.6
5	24,578	2454.3	− 2528	−73.7	× 31 / 250	−9.1
6	24,579	2451.9	− 2552	−100.1	× 41 / 250	−16.4
7	24,580	2478.9	− 2567	−88.1	× 40 / 250	−14.1
8	24,581	2457.7	− 2586	−128.3	× 33 / 250	−16.9
11	24,582	2472.5	− 2628	−155.5	× 35 / 250	−21.8
Sum, rounded to a whole point						−94

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,525	2367.1	− 2436	−68.9	× 27 / 249	−7.5
4	24,526	2422.1	− 2485	−62.9	× 30 / 249	−7.6
5	24,527	2442.4	− 2528	−85.6	× 39 / 249	−13.4
6	24,528	2463.5	− 2552	−88.5	× 31 / 249	−11
7	24,529	2464.2	− 2567	−102.8	× 40 / 249	−16.5
8	24,530	2457.4	− 2586	−128.6	× 38 / 249	−19.6
11	24,531	2502.3	− 2628	−125.7	× 44 / 249	−22.2
Sum, rounded to a whole point						−98

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,379	2418.8	− 2436	−17.2	× 29 / 226	−2.2
4	24,380	2414.2	− 2485	−70.8	× 28 / 226	−8.8
5	24,381	2434.3	− 2528	−93.7	× 32 / 226	−13.3
6	24,382	2428.4	− 2552	−123.6	× 34 / 226	−18.6
7	24,383	2462.7	− 2567	−104.3	× 31 / 226	−14.3
8	24,384	2469.1	− 2586	−116.9	× 40 / 226	−20.7
11	24,385	2449.5	− 2628	−178.5	× 32 / 226	−25.3
Sum, rounded to a whole point						−103

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,266	2385.3	− 2436	−50.7	× 29 / 198	−7.4
4	24,267	2421.2	− 2485	−63.8	× 27 / 198	−8.7
5	24,268	2399.6	− 2528	−128.4	× 30 / 198	−19.5
6	24,269	2425.7	− 2552	−126.3	× 30 / 198	−19.1
7	24,270	2413.4	− 2567	−153.6	× 31 / 198	−24
8	24,271	2499.0	− 2586	−87	× 23 / 198	−10.1
11	24,272	2425.9	− 2628	−202.1	× 28 / 198	−28.6
Sum, rounded to a whole point						−117

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −52, −42, −62, −71, −68, −83, −94, −98, −103, −117 → −79
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 10 · 2016→2017: 20 · 2017→2018: 9 · 2018→2019: 3 · 2019→2021: 15 · 2021→2022: 11 · 2022→2023: 4 · 2023→2024: 5 · 2024→2025: 14 → average 10.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.1 × 2.66 = 26.9. Upper limit −52.1, lower limit −105.9.

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.