Arcadia Unified: english

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	20,756	2479.8	− 2432	47.8	× 632 / 4953	6.1
4	20,757	2525.9	− 2473	52.9	× 633 / 4953	6.8
5	20,760	2563.8	− 2502	61.8	× 646 / 4953	8.1
6	20,761	2588.5	− 2531	57.5	× 720 / 4953	8.4
7	20,764	2605.6	− 2552	53.6	× 755 / 4953	8.2
8	20,765	2617.7	− 2567	50.7	× 764 / 4953	7.8
11	20,768	2660.8	− 2583	77.8	× 803 / 4953	12.6
Sum, rounded to a whole point						58

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	19,699	2469.6	− 2432	37.6	× 691 / 5105	5.1
4	19,700	2527.0	− 2473	54	× 669 / 5105	7.1
5	19,703	2572.0	− 2502	70	× 673 / 5105	9.2
6	19,705	2598.9	− 2531	67.9	× 696 / 5105	9.3
7	19,706	2620.4	− 2552	68.4	× 759 / 5105	10.2
8	19,709	2628.7	− 2567	61.7	× 777 / 5105	9.4
11	19,711	2652.9	− 2583	69.9	× 840 / 5105	11.5
Sum, rounded to a whole point						62

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	19,992	2484.4	− 2432	52.4	× 603 / 5063	6.2
4	19,994	2527.9	− 2473	54.9	× 696 / 5063	7.5
5	19,997	2577.7	− 2502	75.7	× 697 / 5063	10.4
6	19,999	2601.9	− 2531	70.9	× 711 / 5063	10
7	20,001	2621.3	− 2552	69.3	× 730 / 5063	10
8	20,003	2639.4	− 2567	72.4	× 766 / 5063	11
11	20,005	2651.6	− 2583	68.6	× 860 / 5063	11.7
Sum, rounded to a whole point						67

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	19,992	2494.7	− 2432	62.7	× 578 / 4928	7.4
4	19,994	2542.0	− 2473	69	× 631 / 4928	8.8
5	19,996	2573.5	− 2502	71.5	× 726 / 4928	10.5
6	19,998	2590.7	− 2531	59.7	× 728 / 4928	8.8
7	20,000	2623.4	− 2552	71.4	× 735 / 4928	10.6
8	20,002	2626.7	− 2567	59.7	× 737 / 4928	8.9
11	20,004	2616.7	− 2583	33.7	× 793 / 4928	5.4
Sum, rounded to a whole point						61

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	20,171	2485.2	− 2432	53.2	× 574 / 4761	6.4
4	20,172	2530.8	− 2473	57.8	× 612 / 4761	7.4
5	20,173	2581.5	− 2502	79.5	× 646 / 4761	10.8
6	20,174	2593.0	− 2531	62	× 771 / 4761	10
7	20,175	2620.2	− 2552	68.2	× 740 / 4761	10.6
8	20,176	2640.2	− 2567	73.2	× 743 / 4761	11.4
11	20,177	2640.8	− 2583	57.8	× 675 / 4761	8.2
Sum, rounded to a whole point						65

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	19,660	2644.8	− 2583	61.8	× 640 / 640	61.8
Sum, rounded to a whole point						62

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	20,198	2486.0	− 2432	54	× 602 / 4445	7.3
4	20,199	2527.3	− 2473	54.3	× 609 / 4445	7.4
5	20,200	2570.4	− 2502	68.4	× 620 / 4445	9.5
6	20,201	2577.0	− 2531	46	× 617 / 4445	6.4
7	20,202	2619.0	− 2552	67	× 632 / 4445	9.5
8	20,203	2626.1	− 2567	59.1	× 658 / 4445	8.7
11	20,204	2638.3	− 2583	55.3	× 707 / 4445	8.8
Sum, rounded to a whole point						58

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	20,169	2488.8	− 2432	56.8	× 586 / 4565	7.3
4	20,170	2526.4	− 2473	53.4	× 629 / 4565	7.4
5	20,171	2563.4	− 2502	61.4	× 637 / 4565	8.6
6	20,172	2583.3	− 2531	52.3	× 676 / 4565	7.7
7	20,173	2609.3	− 2552	57.3	× 634 / 4565	8
8	20,174	2619.9	− 2567	52.9	× 654 / 4565	7.6
11	20,175	2643.6	− 2583	60.6	× 749 / 4565	9.9
Sum, rounded to a whole point						56

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	20,109	2480.1	− 2432	48.1	× 641 / 4711	6.5
4	20,110	2528.5	− 2473	55.5	× 605 / 4711	7.1
5	20,111	2566.6	− 2502	64.6	× 653 / 4711	9
6	20,112	2575.9	− 2531	44.9	× 671 / 4711	6.4
7	20,113	2613.7	− 2552	61.7	× 686 / 4711	9
8	20,114	2613.2	− 2567	46.2	× 656 / 4711	6.4
11	20,115	2630.0	− 2583	47	× 799 / 4711	8
Sum, rounded to a whole point						52

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	20,042	2470.2	− 2432	38.2	× 593 / 4670	4.9
4	20,043	2521.6	− 2473	48.6	× 666 / 4670	6.9
5	20,044	2561.7	− 2502	59.7	× 645 / 4670	8.2
6	20,045	2577.7	− 2531	46.7	× 680 / 4670	6.8
7	20,046	2607.8	− 2552	55.8	× 701 / 4670	8.4
8	20,047	2626.3	− 2567	59.3	× 705 / 4670	9
11	20,048	2618.5	− 2583	35.5	× 680 / 4670	5.2
Sum, rounded to a whole point						49

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	20,114	2467.4	− 2432	35.4	× 614 / 4821	4.5
4	20,115	2511.9	− 2473	38.9	× 610 / 4821	4.9
5	20,116	2557.0	− 2502	55	× 719 / 4821	8.2
6	20,117	2578.6	− 2531	47.6	× 694 / 4821	6.9
7	20,118	2606.8	− 2552	54.8	× 714 / 4821	8.1
8	20,119	2608.4	− 2567	41.4	× 745 / 4821	6.4
11	20,120	2634.9	− 2583	51.9	× 725 / 4821	7.8
Sum, rounded to a whole point						47

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 58, 62, 67, 61, 65, 62, 58, 56, 52, 49, 47 → 57.9
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 4 · 2016→2017: 5 · 2017→2018: 6 · 2018→2019: 4 · 2019→2021: 3 · 2021→2022: 4 · 2022→2023: 2 · 2023→2024: 4 · 2024→2025: 3 · 2025→2026: 2 → average 3.7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 3.7 × 2.66 = 9.8. Upper limit 67.7, lower limit 48.1.

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.

Arcadia Unified