Learning Choice Academy - Chula Vista: 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.

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,812	2420.2	− 2436	−15.8	× 20 / 184	−1.7
4	67,813	2445.9	− 2485	−39.1	× 20 / 184	−4.3
5	67,814	2476.8	− 2528	−51.2	× 17 / 184	−4.7
6	67,815	2469.3	− 2552	−82.7	× 17 / 184	−7.6
7	67,816	2496.9	− 2567	−70.1	× 33 / 184	−12.6
8	67,817	2494.9	− 2586	−91.1	× 42 / 184	−20.8
11	67,818	2542.6	− 2628	−85.4	× 35 / 184	−16.2
Sum, rounded to a whole point						−68

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	66,409	2424.8	− 2436	−11.2	× 19 / 192	−1.1
4	66,410	2480.6	− 2485	−4.4	× 28 / 192	−0.6
5	66,411	2480.8	− 2528	−47.2	× 25 / 192	−6.1
6	66,412	2494.5	− 2552	−57.5	× 19 / 192	−5.7
7	66,413	2540.6	− 2567	−26.4	× 23 / 192	−3.2
8	66,414	2556.2	− 2586	−29.8	× 45 / 192	−7
11	66,415	2599.1	− 2628	−28.9	× 33 / 192	−5
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	67,938	2374.5	− 2436	−61.5	× 23 / 205	−6.9
4	67,939	2423.2	− 2485	−61.8	× 20 / 205	−6
5	67,940	2462.6	− 2528	−65.4	× 30 / 205	−9.6
6	67,941	2471.5	− 2552	−80.5	× 24 / 205	−9.4
7	67,942	2508.7	− 2567	−58.3	× 38 / 205	−10.8
8	67,943	2504.5	− 2586	−81.5	× 31 / 205	−12.3
11	67,944	2557.5	− 2628	−70.5	× 39 / 205	−13.4
Sum, rounded to a whole point						−68

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,948	2436.1	− 2436	0.1	× 17 / 203	0
4	67,949	2406.0	− 2485	−79	× 18 / 203	−7
5	67,950	2447.8	− 2528	−80.2	× 22 / 203	−8.7
6	67,951	2486.0	− 2552	−66	× 30 / 203	−9.8
7	67,952	2498.9	− 2567	−68.1	× 37 / 203	−12.4
8	67,953	2518.5	− 2586	−67.5	× 40 / 203	−13.3
11	67,954	2578.7	− 2628	−49.3	× 39 / 203	−9.5
Sum, rounded to a whole point						−61

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,942	2390.6	− 2436	−45.4	× 15 / 200	−3.4
4	67,943	2465.7	− 2485	−19.3	× 19 / 200	−1.8
5	67,944	2457.7	− 2528	−70.3	× 27 / 200	−9.5
6	67,945	2479.0	− 2552	−73	× 21 / 200	−7.7
7	67,946	2500.7	− 2567	−66.3	× 46 / 200	−15.2
8	67,947	2511.4	− 2586	−74.6	× 37 / 200	−13.8
11	67,948	2603.9	− 2628	−24.1	× 35 / 200	−4.2
Sum, rounded to a whole point						−56

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,700	2398.3	− 2436	−37.7	× 29 / 219	−5
4	67,701	2464.8	− 2485	−20.2	× 24 / 219	−2.2
5	67,702	2451.4	− 2528	−76.6	× 25 / 219	−8.7
6	67,703	2469.2	− 2552	−82.8	× 28 / 219	−10.6
7	67,704	2544.8	− 2567	−22.2	× 30 / 219	−3
8	67,705	2513.0	− 2586	−73	× 48 / 219	−16
11	67,706	2594.1	− 2628	−33.9	× 35 / 219	−5.4
Sum, rounded to a whole point						−51

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −68, −29, −68, −61, −56, −51 → −55.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2019→2021: 39 · 2021→2022: 39 · 2022→2023: 7 · 2023→2024: 5 · 2024→2025: 5 → average 19
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 19 × 2.66 = 50.5. Upper limit −5, lower limit −106.

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 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.