Ezequiel Tafoya Alvarado Academy: 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	41,250	2383.4	− 2436	−52.6	× 49 / 240	−10.7
4	41,252	2431.3	− 2485	−53.7	× 47 / 240	−10.5
5	41,253	2449.7	− 2528	−78.3	× 40 / 240	−13.1
6	41,256	2513.1	− 2552	−38.9	× 43 / 240	−7
7	41,257	2524.8	− 2567	−42.2	× 34 / 240	−6
8	41,260	2508.7	− 2586	−77.3	× 27 / 240	−8.7
Sum, rounded to a whole point						−56

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	38,154	2387.3	− 2436	−48.7	× 61 / 290	−10.2
4	38,157	2444.1	− 2485	−40.9	× 59 / 290	−8.3
5	38,159	2435.4	− 2528	−92.6	× 53 / 290	−16.9
6	38,161	2480.9	− 2552	−71.1	× 41 / 290	−10.1
7	38,162	2485.0	− 2567	−82	× 41 / 290	−11.6
8	38,165	2521.5	− 2586	−64.5	× 35 / 290	−7.8
Sum, rounded to a whole point						−65

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,060	2380.0	− 2436	−56	× 62 / 339	−10.2
4	39,063	2425.3	− 2485	−59.7	× 60 / 339	−10.6
5	39,065	2439.8	− 2528	−88.2	× 60 / 339	−15.6
6	39,067	2453.7	− 2552	−98.3	× 61 / 339	−17.7
7	39,069	2477.7	− 2567	−89.3	× 55 / 339	−14.5
8	39,070	2504.4	− 2586	−81.6	× 41 / 339	−9.9
Sum, rounded to a whole point						−78

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,081	2397.1	− 2436	−38.9	× 57 / 354	−6.3
4	39,084	2446.7	− 2485	−38.3	× 60 / 354	−6.5
5	39,085	2467.8	− 2528	−60.2	× 62 / 354	−10.5
6	39,088	2481.8	− 2552	−70.2	× 62 / 354	−12.3
7	39,089	2440.5	− 2567	−126.5	× 61 / 354	−21.8
8	39,092	2536.1	− 2586	−49.9	× 52 / 354	−7.3
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	39,228	2397.9	− 2436	−38.1	× 62 / 365	−6.5
4	39,229	2435.1	− 2485	−49.9	× 61 / 365	−8.3
5	39,230	2426.1	− 2528	−101.9	× 57 / 365	−15.9
6	39,231	2462.4	− 2552	−89.6	× 66 / 365	−16.2
7	39,232	2480.0	− 2567	−87	× 60 / 365	−14.3
8	39,233	2459.3	− 2586	−126.7	× 59 / 365	−20.5
Sum, rounded to a whole point						−82

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	38,991	2368.0	− 2436	−68	× 81 / 397	−13.9
4	38,992	2402.8	− 2485	−82.2	× 69 / 397	−14.3
5	38,993	2434.2	− 2528	−93.8	× 77 / 397	−18.2
6	38,994	2488.9	− 2552	−63.1	× 58 / 397	−9.2
7	38,995	2435.2	− 2567	−131.8	× 57 / 397	−18.9
8	38,996	2486.5	− 2586	−99.5	× 55 / 397	−13.8
Sum, rounded to a whole point						−88

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,044	2384.3	− 2436	−51.7	× 83 / 434	−9.9
4	39,045	2404.7	− 2485	−80.3	× 82 / 434	−15.2
5	39,046	2410.2	− 2528	−117.8	× 74 / 434	−20.1
6	39,047	2439.0	− 2552	−113	× 85 / 434	−22.1
7	39,048	2480.6	− 2567	−86.4	× 54 / 434	−10.8
8	39,049	2457.5	− 2586	−128.5	× 56 / 434	−16.6
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	38,872	2390.9	− 2436	−45.1	× 76 / 451	−7.6
4	38,873	2405.3	− 2485	−79.7	× 82 / 451	−14.5
5	38,874	2408.2	− 2528	−119.8	× 82 / 451	−21.8
6	38,875	2435.0	− 2552	−117	× 75 / 451	−19.5
7	38,876	2465.1	− 2567	−101.9	× 83 / 451	−18.8
8	38,877	2491.0	− 2586	−95	× 53 / 451	−11.2
Sum, rounded to a whole point						−93

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	38,643	2407.3	− 2436	−28.7	× 72 / 467	−4.4
4	38,644	2436.1	− 2485	−48.9	× 78 / 467	−8.2
5	38,645	2426.0	− 2528	−102	× 83 / 467	−18.1
6	38,646	2438.8	− 2552	−113.2	× 83 / 467	−20.1
7	38,647	2473.0	− 2567	−94	× 74 / 467	−14.9
8	38,648	2469.8	− 2586	−116.2	× 77 / 467	−19.2
Sum, rounded to a whole point						−85

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −56, −65, −78, −65, −82, −88, −95, −93, −85 → −78.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 9 · 2016→2017: 13 · 2017→2018: 13 · 2018→2019: 17 · 2019→2022: 6 · 2022→2023: 7 · 2023→2024: 2 · 2024→2025: 8 → average 9.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.4 × 2.66 = 25. Upper limit −53.6, lower limit −103.6.

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.