Santa Rosa French-American Charter (Srfacs): 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	95,139	2434.6	− 2436	−1.4	× 54 / 152	−0.5
4	95,140	2449.1	− 2485	−35.9	× 43 / 152	−10.2
5	95,143	2490.9	− 2528	−37.1	× 22 / 152	−5.4
6	95,144	2524.8	− 2552	−27.2	× 22 / 152	−3.9
7	95,147	2587.4	− 2567	20.4	× 11 / 152	1.5
Sum, rounded to a whole point						−18

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	88,362	2408.8	− 2436	−27.2	× 52 / 180	−7.9
4	88,363	2448.4	− 2485	−36.6	× 47 / 180	−9.6
5	88,366	2506.9	− 2528	−21.1	× 39 / 180	−4.6
6	88,367	2515.5	− 2552	−36.5	× 24 / 180	−4.9
7	88,369	2554.9	− 2567	−12.1	× 18 / 180	−1.2
Sum, rounded to a whole point						−28

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,921	2443.8	− 2436	7.8	× 69 / 200	2.7
4	90,923	2449.3	− 2485	−35.7	× 52 / 200	−9.3
5	90,925	2502.5	− 2528	−25.5	× 39 / 200	−5
6	90,926	2565.8	− 2552	13.8	× 40 / 200	2.8
Sum, rounded to a whole point						−9

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,762	2451.9	− 2436	15.9	× 70 / 230	4.8
4	91,763	2504.0	− 2485	19	× 70 / 230	5.8
5	91,764	2533.4	− 2528	5.4	× 56 / 230	1.3
6	91,765	2577.6	− 2552	25.6	× 34 / 230	3.8
Sum, rounded to a whole point						16

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,006	2431.9	− 2436	−4.1	× 55 / 189	−1.2
4	92,007	2482.2	− 2485	−2.8	× 50 / 189	−0.7
5	92,008	2551.2	− 2528	23.2	× 39 / 189	4.8
6	92,009	2567.8	− 2552	15.8	× 45 / 189	3.8
Sum, rounded to a whole point						7

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,913	2408.0	− 2436	−28	× 57 / 208	−7.7
4	91,914	2479.6	− 2485	−5.4	× 51 / 208	−1.3
5	91,915	2513.9	− 2528	−14.1	× 47 / 208	−3.2
6	91,916	2599.8	− 2552	47.8	× 36 / 208	8.3
7	91,917	2598.0	− 2567	31	× 17 / 208	2.5
Sum, rounded to a whole point						−1

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,841	2420.7	− 2436	−15.3	× 63 / 239	−4
4	91,842	2462.0	− 2485	−23	× 55 / 239	−5.3
5	91,843	2522.6	− 2528	−5.4	× 48 / 239	−1.1
6	91,844	2566.7	− 2552	14.7	× 42 / 239	2.6
7	91,845	2600.6	− 2567	33.6	× 17 / 239	2.4
8	91,846	2561.7	− 2586	−24.3	× 14 / 239	−1.4
Sum, rounded to a whole point						−7

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,549	2443.9	− 2436	7.9	× 69 / 264	2.1
4	91,550	2485.1	− 2485	0.1	× 57 / 264	0
5	91,551	2485.1	− 2528	−42.9	× 52 / 264	−8.5
6	91,552	2587.9	− 2552	35.9	× 49 / 264	6.7
7	91,553	2530.0	− 2567	−37	× 20 / 264	−2.8
8	91,554	2614.2	− 2586	28.2	× 17 / 264	1.8
Sum, rounded to a whole point						−1

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −18, −28, −9, 16, 7, −1, −7, −1 → −5.1
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: 19 · 2017→2019: 25 · 2019→2022: 9 · 2022→2023: 8 · 2023→2024: 6 · 2024→2025: 6 → average 11.9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 11.9 × 2.66 = 31.7. Upper limit 26.6, lower limit −36.8.

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.