California Virtual Academy San Mateo: 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	82,817	2399.7	− 2436	−36.3	× 41 / 433	−3.4
4	82,818	2451.9	− 2485	−33.1	× 48 / 433	−3.7
5	82,821	2464.5	− 2528	−63.5	× 37 / 433	−5.4
6	82,822	2465.6	− 2552	−86.4	× 58 / 433	−11.6
7	82,825	2486.8	− 2567	−80.2	× 76 / 433	−14.1
8	82,826	2534.1	− 2586	−51.9	× 86 / 433	−10.3
11	82,829	2514.7	− 2628	−113.3	× 87 / 433	−22.8
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	76,777	2426.5	− 2436	−9.5	× 38 / 393	−0.9
4	76,779	2455.2	− 2485	−29.8	× 42 / 393	−3.2
5	76,780	2494.1	− 2528	−33.9	× 31 / 393	−2.7
6	76,782	2505.0	− 2552	−47	× 51 / 393	−6.1
7	76,784	2535.0	− 2567	−32	× 72 / 393	−5.9
8	76,787	2522.6	− 2586	−63.4	× 78 / 393	−12.6
11	76,788	2537.4	− 2628	−90.6	× 81 / 393	−18.7
Sum, rounded to a whole point						−50

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	78,859	2432.7	− 2436	−3.3	× 29 / 347	−0.3
4	78,861	2456.3	− 2485	−28.7	× 33 / 347	−2.7
5	78,863	2480.1	− 2528	−47.9	× 38 / 347	−5.2
6	78,865	2493.6	− 2552	−58.4	× 35 / 347	−5.9
7	78,868	2523.3	− 2567	−43.7	× 59 / 347	−7.4
8	78,870	2517.1	− 2586	−68.9	× 61 / 347	−12.1
11	78,871	2520.5	− 2628	−107.5	× 92 / 347	−28.5
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	79,004	2381.7	− 2436	−54.3	× 31 / 362	−4.7
4	79,007	2455.1	− 2485	−29.9	× 28 / 362	−2.3
5	79,008	2464.7	− 2528	−63.3	× 38 / 362	−6.6
6	79,011	2472.8	− 2552	−79.2	× 58 / 362	−12.7
7	79,012	2506.2	− 2567	−60.8	× 52 / 362	−8.7
8	79,015	2493.3	− 2586	−92.7	× 72 / 362	−18.4
11	79,016	2544.3	− 2628	−83.7	× 83 / 362	−19.2
Sum, rounded to a whole point						−73

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,540	2407.4	− 2436	−28.6	× 31 / 444	−2
4	79,541	2421.4	− 2485	−63.6	× 36 / 444	−5.2
5	79,542	2473.4	− 2528	−54.6	× 31 / 444	−3.8
6	79,543	2471.5	− 2552	−80.5	× 57 / 444	−10.3
7	79,544	2484.7	− 2567	−82.3	× 79 / 444	−14.6
8	79,545	2493.3	− 2586	−92.7	× 78 / 444	−16.3
11	79,546	2534.8	− 2628	−93.2	× 132 / 444	−27.7
Sum, rounded to a whole point						−80

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	78,025	2471.9	− 2436	35.9	× 63 / 466	4.9
4	78,026	2478.8	− 2485	−6.2	× 58 / 466	−0.8
5	78,027	2511.8	− 2528	−16.2	× 44 / 466	−1.5
6	78,028	2513.9	− 2552	−38.1	× 60 / 466	−4.9
7	78,029	2554.8	− 2567	−12.2	× 63 / 466	−1.6
8	78,030	2548.9	− 2586	−37.1	× 75 / 466	−6
11	78,031	2543.2	− 2628	−84.8	× 103 / 466	−18.7
Sum, rounded to a whole point						−29

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,782	2452.9	− 2436	16.9	× 68 / 509	2.3
4	79,783	2502.9	− 2485	17.9	× 79 / 509	2.8
5	79,784	2496.2	− 2528	−31.8	× 78 / 509	−4.9
6	79,785	2515.9	− 2552	−36.1	× 61 / 509	−4.3
7	79,786	2541.8	− 2567	−25.2	× 62 / 509	−3.1
8	79,787	2546.4	− 2586	−39.6	× 77 / 509	−6
11	79,788	2562.7	− 2628	−65.3	× 84 / 509	−10.8
Sum, rounded to a whole point						−24

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,754	2445.8	− 2436	9.8	× 68 / 572	1.2
4	79,755	2477.9	− 2485	−7.1	× 77 / 572	−1
5	79,756	2479.2	− 2528	−48.8	× 72 / 572	−6.1
6	79,757	2490.9	− 2552	−61.1	× 75 / 572	−8
7	79,758	2497.8	− 2567	−69.2	× 84 / 572	−10.2
8	79,759	2530.4	− 2586	−55.6	× 96 / 572	−9.3
11	79,760	2529.0	− 2628	−99	× 100 / 572	−17.3
Sum, rounded to a whole point						−51

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,778	2414.5	− 2436	−21.5	× 60 / 585	−2.2
4	79,779	2463.9	− 2485	−21.1	× 54 / 585	−1.9
5	79,780	2501.6	− 2528	−26.4	× 59 / 585	−2.7
6	79,781	2516.0	− 2552	−36	× 86 / 585	−5.3
7	79,782	2514.0	− 2567	−53	× 106 / 585	−9.6
8	79,783	2532.8	− 2586	−53.2	× 117 / 585	−10.6
11	79,784	2563.4	− 2628	−64.6	× 103 / 585	−11.4
Sum, rounded to a whole point						−44

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,444	2452.4	− 2436	16.4	× 50 / 668	1.2
4	79,445	2450.8	− 2485	−34.2	× 69 / 668	−3.5
5	79,446	2476.2	− 2528	−51.8	× 64 / 668	−5
6	79,447	2538.4	− 2552	−13.6	× 101 / 668	−2.1
7	79,448	2568.1	− 2567	1.1	× 120 / 668	0.2
8	79,449	2566.1	− 2586	−19.9	× 144 / 668	−4.3
11	79,450	2618.1	− 2628	−9.9	× 120 / 668	−1.8
Sum, rounded to a whole point						−15

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −71, −50, −62, −73, −80, −29, −24, −51, −44, −15 → −49.9
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 21 · 2016→2017: 12 · 2017→2018: 11 · 2018→2019: 7 · 2019→2021: 51 · 2021→2022: 5 · 2022→2023: 27 · 2023→2024: 7 · 2024→2025: 29 → average 18.9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 18.9 × 2.66 = 50.3. Upper limit 0.4, lower limit −100.2.

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. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.