Los Primeros School Of Sciences & Arts: 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	103,824	2449.0	− 2436	13	× 59 / 361	2.1
4	103,825	2484.4	− 2485	−0.6	× 62 / 361	−0.1
5	103,828	2534.9	− 2528	6.9	× 59 / 361	1.1
6	103,829	2525.9	− 2552	−26.1	× 60 / 361	−4.3
7	103,832	2570.0	− 2567	3	× 62 / 361	0.5
8	103,833	2566.5	− 2586	−19.5	× 59 / 361	−3.2
Sum, rounded to a whole point						−4

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	96,485	2462.6	− 2436	26.6	× 59 / 359	4.4
4	96,488	2495.2	− 2485	10.2	× 60 / 359	1.7
5	96,489	2539.0	− 2528	11	× 61 / 359	1.9
6	96,491	2548.1	− 2552	−3.9	× 60 / 359	−0.7
7	96,494	2555.8	− 2567	−11.2	× 60 / 359	−1.9
8	96,495	2607.8	− 2586	21.8	× 59 / 359	3.6
Sum, rounded to a whole point						9

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	99,274	2467.5	− 2436	31.5	× 59 / 368	5.1
4	99,276	2513.2	− 2485	28.2	× 62 / 368	4.8
5	99,279	2516.0	− 2528	−12	× 63 / 368	−2.1
6	99,280	2548.0	− 2552	−4	× 60 / 368	−0.7
7	99,282	2567.9	− 2567	0.9	× 64 / 368	0.2
8	99,284	2556.7	− 2586	−29.3	× 60 / 368	−4.8
Sum, rounded to a whole point						2

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	99,433	2452.3	− 2436	16.3	× 58 / 366	2.6
4	99,435	2523.7	− 2485	38.7	× 62 / 366	6.6
5	99,437	2532.5	− 2528	4.5	× 62 / 366	0.8
6	99,439	2518.2	− 2552	−33.8	× 61 / 366	−5.6
7	99,441	2550.3	− 2567	−16.7	× 62 / 366	−2.8
8	99,443	2567.5	− 2586	−18.5	× 61 / 366	−3.1
Sum, rounded to a whole point						−2

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	100,097	2463.4	− 2436	27.4	× 59 / 343	4.7
4	100,098	2513.1	− 2485	28.1	× 60 / 343	4.9
5	100,099	2534.3	− 2528	6.3	× 61 / 343	1.1
6	100,100	2553.8	− 2552	1.8	× 61 / 343	0.3
7	100,101	2530.2	− 2567	−36.8	× 52 / 343	−5.6
8	100,102	2561.4	− 2586	−24.6	× 50 / 343	−3.6
Sum, rounded to a whole point						2

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	97,956	2457.8	− 2436	21.8	× 61 / 329	4
4	97,957	2511.5	− 2485	26.5	× 52 / 329	4.2
5	97,958	2520.1	− 2528	−7.9	× 58 / 329	−1.4
6	97,959	2529.3	− 2552	−22.7	× 54 / 329	−3.7
7	97,960	2543.1	− 2567	−23.9	× 55 / 329	−4
8	97,961	2570.2	− 2586	−15.8	× 49 / 329	−2.4
Sum, rounded to a whole point						−3

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	100,318	2451.7	− 2436	15.7	× 67 / 343	3.1
4	100,319	2526.9	− 2485	41.9	× 58 / 343	7.1
5	100,320	2523.2	− 2528	−4.8	× 60 / 343	−0.8
6	100,321	2510.4	− 2552	−41.6	× 50 / 343	−6.1
7	100,322	2549.7	− 2567	−17.3	× 52 / 343	−2.6
8	100,323	2553.5	− 2586	−32.5	× 56 / 343	−5.3
Sum, rounded to a whole point						−5

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	100,154	2465.2	− 2436	29.2	× 70 / 365	5.6
4	100,155	2499.8	− 2485	14.8	× 67 / 365	2.7
5	100,156	2541.0	− 2528	13	× 62 / 365	2.2
6	100,157	2540.5	− 2552	−11.5	× 64 / 365	−2
7	100,158	2535.1	− 2567	−31.9	× 49 / 365	−4.3
8	100,159	2558.2	− 2586	−27.8	× 53 / 365	−4
Sum, rounded to a whole point						0

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	100,035	2449.1	− 2436	13.1	× 63 / 386	2.1
4	100,036	2508.2	− 2485	23.2	× 69 / 386	4.1
5	100,037	2530.9	− 2528	2.9	× 68 / 386	0.5
6	100,038	2554.4	− 2552	2.4	× 67 / 386	0.4
7	100,039	2560.7	− 2567	−6.3	× 70 / 386	−1.1
8	100,040	2557.8	− 2586	−28.2	× 49 / 386	−3.6
Sum, rounded to a whole point						2

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	99,741	2468.5	− 2436	32.5	× 69 / 412	5.4
4	99,742	2504.6	− 2485	19.6	× 69 / 412	3.3
5	99,743	2530.7	− 2528	2.7	× 70 / 412	0.5
6	99,744	2548.9	− 2552	−3.1	× 68 / 412	−0.5
7	99,745	2568.2	− 2567	1.2	× 67 / 412	0.2
8	99,746	2585.0	− 2586	−1	× 69 / 412	−0.2
Sum, rounded to a whole point						9

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −4, 9, 2, −2, 2, −3, −5, 0, 2, 9 → 1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 13 · 2016→2017: 7 · 2017→2018: 4 · 2018→2019: 4 · 2019→2021: 5 · 2021→2022: 2 · 2022→2023: 5 · 2023→2024: 2 · 2024→2025: 7 → average 5.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 5.4 × 2.66 = 14.4. Upper limit 15.4, lower limit −13.4.

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.