Brea-Olinda Unified: math

The shaded band is this district'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	48,205	2451.1	− 2436	15.1	× 440 / 3096	2.1
4	48,206	2510.4	− 2485	25.4	× 420 / 3096	3.4
5	48,209	2528.8	− 2528	0.8	× 445 / 3096	0.1
6	48,210	2562.5	− 2552	10.5	× 441 / 3096	1.5
7	48,213	2582.7	− 2567	15.7	× 410 / 3096	2.1
8	48,214	2608.6	− 2586	22.6	× 471 / 3096	3.4
11	48,217	2616.4	− 2628	−11.6	× 469 / 3096	−1.8
Sum, rounded to a whole point						11

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	44,829	2461.3	− 2436	25.3	× 404 / 2999	3.4
4	44,832	2507.9	− 2485	22.9	× 447 / 2999	3.4
5	44,834	2540.1	− 2528	12.1	× 414 / 2999	1.7
6	44,835	2576.1	− 2552	24.1	× 439 / 2999	3.5
7	44,838	2583.0	− 2567	16	× 446 / 2999	2.4
8	44,840	2583.1	− 2586	−2.9	× 403 / 2999	−0.4
11	44,842	2615.5	− 2628	−12.5	× 446 / 2999	−1.9
Sum, rounded to a whole point						12

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,008	2476.6	− 2436	40.6	× 436 / 3081	5.7
4	46,010	2517.6	− 2485	32.6	× 428 / 3081	4.5
5	46,013	2543.0	− 2528	15	× 451 / 3081	2.2
6	46,014	2584.0	− 2552	32	× 428 / 3081	4.4
7	46,016	2595.6	− 2567	28.6	× 442 / 3081	4.1
8	46,019	2602.7	− 2586	16.7	× 437 / 3081	2.4
11	46,020	2604.9	− 2628	−23.1	× 459 / 3081	−3.4
Sum, rounded to a whole point						20

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,019	2480.4	− 2436	44.4	× 406 / 3111	5.8
4	46,021	2526.7	− 2485	41.7	× 441 / 3111	5.9
5	46,023	2542.9	− 2528	14.9	× 449 / 3111	2.2
6	46,025	2578.7	− 2552	26.7	× 451 / 3111	3.9
7	46,027	2598.6	− 2567	31.6	× 437 / 3111	4.4
8	46,029	2597.8	− 2586	11.8	× 460 / 3111	1.7
11	46,031	2609.2	− 2628	−18.8	× 467 / 3111	−2.8
Sum, rounded to a whole point						21

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,208	2480.7	− 2436	44.7	× 432 / 3052	6.3
4	46,209	2525.3	− 2485	40.3	× 406 / 3052	5.4
5	46,210	2549.5	− 2528	21.5	× 444 / 3052	3.1
6	46,211	2570.2	− 2552	18.2	× 458 / 3052	2.7
7	46,212	2586.5	− 2567	19.5	× 463 / 3052	3
8	46,213	2595.5	− 2586	9.5	× 445 / 3052	1.4
11	46,214	2602.5	− 2628	−25.5	× 404 / 3052	−3.4
Sum, rounded to a whole point						19

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
7	44,871	2577.3	− 2567	10.3	× 419 / 1261	3.4
8	44,872	2565.0	− 2586	−21	× 448 / 1261	−7.5
11	44,873	2605.4	− 2628	−22.6	× 394 / 1261	−7.1
Sum, rounded to a whole point						−11

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,028	2463.8	− 2436	27.8	× 441 / 3051	4
4	46,029	2513.6	− 2485	28.6	× 449 / 3051	4.2
5	46,030	2537.4	− 2528	9.4	× 432 / 3051	1.3
6	46,031	2581.3	− 2552	29.3	× 459 / 3051	4.4
7	46,032	2587.2	− 2567	20.2	× 438 / 3051	2.9
8	46,033	2571.7	− 2586	−14.3	× 419 / 3051	−2
11	46,034	2601.2	− 2628	−26.8	× 413 / 3051	−3.6
Sum, rounded to a whole point						11

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,018	2469.8	− 2436	33.8	× 461 / 3062	5.1
4	46,019	2509.8	− 2485	24.8	× 439 / 3062	3.6
5	46,020	2535.6	− 2528	7.6	× 437 / 3062	1.1
6	46,021	2575.5	− 2552	23.5	× 427 / 3062	3.3
7	46,022	2598.7	− 2567	31.7	× 450 / 3062	4.7
8	46,023	2580.9	− 2586	−5.1	× 422 / 3062	−0.7
11	46,024	2590.0	− 2628	−38	× 426 / 3062	−5.3
Sum, rounded to a whole point						12

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,871	2470.9	− 2436	34.9	× 440 / 3104	4.9
4	45,872	2516.5	− 2485	31.5	× 464 / 3104	4.7
5	45,873	2532.8	− 2528	4.8	× 442 / 3104	0.7
6	45,874	2576.3	− 2552	24.3	× 452 / 3104	3.5
7	45,875	2594.7	− 2567	27.7	× 441 / 3104	3.9
8	45,876	2592.8	− 2586	6.8	× 441 / 3104	1
11	45,877	2606.1	− 2628	−21.9	× 424 / 3104	−3
Sum, rounded to a whole point						16

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,623	2471.1	− 2436	35.1	× 431 / 3043	5
4	45,624	2524.4	− 2485	39.4	× 433 / 3043	5.6
5	45,625	2535.1	− 2528	7.1	× 471 / 3043	1.1
6	45,626	2571.9	− 2552	19.9	× 440 / 3043	2.9
7	45,627	2595.2	− 2567	28.2	× 461 / 3043	4.3
8	45,628	2609.9	− 2586	23.9	× 424 / 3043	3.3
11	45,629	2615.5	− 2628	−12.5	× 383 / 3043	−1.6
Sum, rounded to a whole point						21

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,519	2467.0	− 2436	31	× 364 / 2893	3.9
4	45,520	2517.2	− 2485	32.2	× 421 / 2893	4.7
5	45,521	2539.1	− 2528	11.1	× 434 / 2893	1.7
6	45,522	2581.1	− 2552	29.1	× 462 / 2893	4.6
7	45,523	2597.2	− 2567	30.2	× 435 / 2893	4.5
8	45,524	2609.4	− 2586	23.4	× 410 / 2893	3.3
11	45,525	2618.9	− 2628	−9.1	× 367 / 2893	−1.2
Sum, rounded to a whole point						22

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 11, 12, 20, 21, 19, −11, 11, 12, 16, 21, 22 → 14
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 1 · 2016→2017: 8 · 2017→2018: 1 · 2018→2019: 2 · 2019→2021: 30 · 2021→2022: 22 · 2022→2023: 1 · 2023→2024: 4 · 2024→2025: 5 · 2025→2026: 1 → average 7.5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7.5 × 2.66 = 20. Upper limit 34, lower limit −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 — for a district, the total across its schools. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.

Brea-Olinda Unified