San Francisco Community Alternative: 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	78,487	2391.2	− 2436	−44.8	× 32 / 190	−7.5
4	78,488	2440.5	− 2485	−44.5	× 32 / 190	−7.5
5	78,491	2432.7	− 2528	−95.3	× 30 / 190	−15
6	78,492	2444.2	− 2552	−107.8	× 33 / 190	−18.7
7	78,494	2506.1	− 2567	−60.9	× 33 / 190	−10.6
8	78,497	2515.5	− 2586	−70.5	× 30 / 190	−11.1
Sum, rounded to a whole point						−71

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	72,683	2420.7	− 2436	−15.3	× 30 / 175	−2.6
4	72,685	2411.6	− 2485	−73.4	× 31 / 175	−13
5	72,687	2460.4	− 2528	−67.6	× 31 / 175	−12
6	72,688	2470.6	− 2552	−81.4	× 29 / 175	−13.5
7	72,691	2474.4	− 2567	−92.6	× 30 / 175	−15.9
8	72,692	2474.9	− 2586	−111.1	× 24 / 175	−15.2
Sum, rounded to a whole point						−72

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	74,655	2430.1	− 2436	−5.9	× 28 / 163	−1
4	74,657	2457.5	− 2485	−27.5	× 30 / 163	−5.1
5	74,659	2449.8	− 2528	−78.2	× 32 / 163	−15.4
6	74,660	2426.0	− 2552	−126	× 23 / 163	−17.8
7	74,663	2441.8	− 2567	−125.2	× 24 / 163	−18.4
8	74,665	2498.3	− 2586	−87.7	× 26 / 163	−14
Sum, rounded to a whole point						−72

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	74,828	2456.6	− 2436	20.6	× 26 / 170	3.2
4	74,831	2438.4	− 2485	−46.6	× 28 / 170	−7.7
5	74,832	2475.6	− 2528	−52.4	× 32 / 170	−9.9
6	74,835	2448.0	− 2552	−104	× 30 / 170	−18.4
7	74,837	2463.3	− 2567	−103.7	× 27 / 170	−16.5
8	74,838	2486.7	− 2586	−99.3	× 27 / 170	−15.8
Sum, rounded to a whole point						−65

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	75,357	2430.8	− 2436	−5.2	× 30 / 169	−0.9
4	75,358	2482.6	− 2485	−2.4	× 21 / 169	−0.3
5	75,359	2464.8	− 2528	−63.2	× 27 / 169	−10.1
6	75,360	2457.1	− 2552	−94.9	× 31 / 169	−17.4
7	75,361	2436.6	− 2567	−130.4	× 31 / 169	−23.9
8	75,362	2452.6	− 2586	−133.4	× 29 / 169	−22.9
Sum, rounded to a whole point						−76

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	75,539	2436.9	− 2436	0.9	× 30 / 180	0.2
4	75,540	2482.9	− 2485	−2.1	× 31 / 180	−0.4
5	75,541	2477.8	− 2528	−50.2	× 34 / 180	−9.5
6	75,542	2455.8	− 2552	−96.2	× 29 / 180	−15.5
7	75,543	2464.8	− 2567	−102.2	× 31 / 180	−17.6
8	75,544	2472.0	− 2586	−114	× 25 / 180	−15.8
Sum, rounded to a whole point						−59

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	75,509	2419.0	− 2436	−17	× 31 / 184	−2.9
4	75,510	2470.5	− 2485	−14.5	× 32 / 184	−2.5
5	75,511	2491.3	− 2528	−36.7	× 31 / 184	−6.2
6	75,512	2462.6	− 2552	−89.4	× 31 / 184	−15.1
7	75,513	2472.6	− 2567	−94.4	× 28 / 184	−14.4
8	75,514	2458.2	− 2586	−127.8	× 31 / 184	−21.5
Sum, rounded to a whole point						−63

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	75,521	2407.9	− 2436	−28.1	× 33 / 176	−5.3
4	75,522	2423.6	− 2485	−61.4	× 32 / 176	−11.2
5	75,523	2502.9	− 2528	−25.1	× 32 / 176	−4.6
6	75,524	2491.5	− 2552	−60.5	× 22 / 176	−7.6
7	75,525	2510.1	− 2567	−56.9	× 30 / 176	−9.7
8	75,526	2459.5	− 2586	−126.5	× 27 / 176	−19.4
Sum, rounded to a whole point						−58

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	75,181	2417.3	− 2436	−18.7	× 28 / 140	−3.7
4	75,182	2465.6	− 2485	−19.4	× 30 / 140	−4.2
5	75,183	2456.8	− 2528	−71.2	× 29 / 140	−14.7
6	75,184	2447.9	− 2552	−104.1	× 24 / 140	−17.8
7	75,185	2475.4	− 2567	−91.6	× 11 / 140	−7.2
8	75,186	2475.6	− 2586	−110.4	× 18 / 140	−14.2
Sum, rounded to a whole point						−62

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −71, −72, −72, −65, −76, −59, −63, −58, −62 → −66.4
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: 0 · 2017→2018: 7 · 2018→2019: 11 · 2019→2022: 17 · 2022→2023: 4 · 2023→2024: 5 · 2024→2025: 4 → average 6.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.1 × 2.66 = 16.2. Upper limit −50.2, lower limit −82.6.

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.