Innovative Horizons Charter: math

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	57,867	2413.6	− 2436	−22.4	× 99 / 591	−3.8
4	57,868	2438.5	− 2485	−46.5	× 93 / 591	−7.3
5	57,871	2448.7	− 2528	−79.3	× 94 / 591	−12.6
6	57,872	2490.3	− 2552	−61.7	× 95 / 591	−9.9
7	57,875	2515.1	− 2567	−51.9	× 111 / 591	−9.7
8	57,876	2516.1	− 2586	−69.9	× 99 / 591	−11.7
Sum, rounded to a whole point						−55

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	53,722	2413.9	− 2436	−22.1	× 99 / 614	−3.6
4	53,724	2453.5	− 2485	−31.5	× 100 / 614	−5.1
5	53,725	2471.9	− 2528	−56.1	× 90 / 614	−8.2
6	53,728	2491.3	− 2552	−60.7	× 96 / 614	−9.5
7	53,730	2504.5	− 2567	−62.5	× 117 / 614	−11.9
8	53,731	2513.5	− 2586	−72.5	× 112 / 614	−13.2
Sum, rounded to a whole point						−52

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,288	2404.4	− 2436	−31.6	× 98 / 618	−5
4	55,291	2434.1	− 2485	−50.9	× 95 / 618	−7.8
5	55,292	2425.0	− 2528	−103	× 96 / 618	−16
6	55,295	2498.5	− 2552	−53.5	× 94 / 618	−8.1
7	55,297	2491.4	− 2567	−75.6	× 118 / 618	−14.4
8	55,299	2495.5	− 2586	−90.5	× 117 / 618	−17.1
Sum, rounded to a whole point						−69

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,384	2423.0	− 2436	−13	× 96 / 618	−2
4	55,386	2429.7	− 2485	−55.3	× 95 / 618	−8.5
5	55,387	2460.6	− 2528	−67.4	× 96 / 618	−10.5
6	55,390	2468.2	− 2552	−83.8	× 94 / 618	−12.7
7	55,391	2496.7	− 2567	−70.3	× 127 / 618	−14.4
8	55,394	2518.4	− 2586	−67.6	× 110 / 618	−12
Sum, rounded to a whole point						−60

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,645	2435.4	− 2436	−0.6	× 97 / 624	−0.1
4	55,646	2454.1	− 2485	−30.9	× 94 / 624	−4.7
5	55,647	2435.9	− 2528	−92.1	× 89 / 624	−13.1
6	55,648	2483.5	− 2552	−68.5	× 100 / 624	−11
7	55,649	2476.4	− 2567	−90.6	× 127 / 624	−18.4
8	55,650	2496.7	− 2586	−89.3	× 117 / 624	−16.7
Sum, rounded to a whole point						−64

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,703	2398.8	− 2436	−37.2	× 95 / 602	−5.9
4	55,704	2420.0	− 2485	−65	× 94 / 602	−10.1
5	55,705	2411.9	− 2528	−116.1	× 94 / 602	−18.1
6	55,706	2440.4	− 2552	−111.6	× 87 / 602	−16.1
7	55,707	2430.2	− 2567	−136.8	× 116 / 602	−26.4
8	55,708	2468.0	− 2586	−118	× 116 / 602	−22.7
Sum, rounded to a whole point						−99

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,654	2396.4	− 2436	−39.6	× 93 / 613	−6
4	55,655	2430.6	− 2485	−54.4	× 96 / 613	−8.5
5	55,656	2450.8	− 2528	−77.2	× 96 / 613	−12.1
6	55,657	2422.8	− 2552	−129.2	× 94 / 613	−19.8
7	55,658	2452.9	− 2567	−114.1	× 117 / 613	−21.8
8	55,659	2447.1	− 2586	−138.9	× 117 / 613	−26.5
Sum, rounded to a whole point						−95

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,530	2381.1	− 2436	−54.9	× 93 / 631	−8.1
4	55,531	2434.1	− 2485	−50.9	× 101 / 631	−8.1
5	55,532	2478.4	− 2528	−49.6	× 97 / 631	−7.6
6	55,533	2426.0	− 2552	−126	× 97 / 631	−19.4
7	55,534	2474.1	− 2567	−92.9	× 121 / 631	−17.8
8	55,535	2486.5	− 2586	−99.5	× 122 / 631	−19.2
Sum, rounded to a whole point						−80

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,284	2393.0	− 2436	−43	× 92 / 601	−6.6
4	55,285	2422.4	− 2485	−62.6	× 90 / 601	−9.4
5	55,286	2464.8	− 2528	−63.2	× 93 / 601	−9.8
6	55,287	2461.1	− 2552	−90.9	× 92 / 601	−13.9
7	55,288	2478.9	− 2567	−88.1	× 118 / 601	−17.3
8	55,289	2496.3	− 2586	−89.7	× 116 / 601	−17.3
Sum, rounded to a whole point						−74

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −55, −52, −69, −60, −64, −99, −95, −80, −74 → −72
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 3 · 2016→2017: 17 · 2017→2018: 9 · 2018→2019: 4 · 2019→2022: 35 · 2022→2023: 4 · 2023→2024: 15 · 2024→2025: 6 → average 11.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 11.6 × 2.66 = 30.9. Upper limit −41.1, lower limit −102.9.

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.