Irvine 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	52,991	2473.8	− 2432	41.8	× 2512 / 16706	6.3
4	52,993	2527.9	− 2473	54.9	× 2335 / 16706	7.7
5	52,995	2565.0	− 2502	63	× 2515 / 16706	9.5
6	52,997	2596.4	− 2531	65.4	× 2438 / 16706	9.5
7	52,999	2615.4	− 2552	63.4	× 2426 / 16706	9.2
8	53,001	2633.4	− 2567	66.4	× 2334 / 16706	9.3
11	53,003	2649.3	− 2583	66.3	× 2146 / 16706	8.5
Sum, rounded to a whole point						60

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	49,234	2482.7	− 2432	50.7	× 2465 / 17230	7.3
4	49,236	2531.6	− 2473	58.6	× 2578 / 17230	8.8
5	49,237	2570.4	− 2502	68.4	× 2427 / 17230	9.6
6	49,240	2596.1	− 2531	65.1	× 2577 / 17230	9.7
7	49,241	2624.2	− 2552	72.2	× 2490 / 17230	10.4
8	49,244	2637.3	− 2567	70.3	× 2502 / 17230	10.2
11	49,245	2664.1	− 2583	81.1	× 2191 / 17230	10.3
Sum, rounded to a whole point						66

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	50,573	2473.0	− 2432	41	× 2501 / 17845	5.7
4	50,576	2525.1	− 2473	52.1	× 2578 / 17845	7.5
5	50,577	2564.4	− 2502	62.4	× 2669 / 17845	9.3
6	50,580	2595.3	− 2531	64.3	× 2535 / 17845	9.1
7	50,582	2622.0	− 2552	70	× 2590 / 17845	10.2
8	50,583	2637.4	− 2567	70.4	× 2550 / 17845	10.1
11	50,586	2671.5	− 2583	88.5	× 2422 / 17845	12
Sum, rounded to a whole point						64

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	50,596	2480.0	− 2432	48	× 2528 / 18233	6.7
4	50,598	2529.3	− 2473	56.3	× 2606 / 18233	8
5	50,600	2566.0	− 2502	64	× 2673 / 18233	9.4
6	50,602	2594.6	− 2531	63.6	× 2746 / 18233	9.6
7	50,604	2620.0	− 2552	68	× 2602 / 18233	9.7
8	50,606	2633.9	− 2567	66.9	× 2697 / 18233	9.9
11	50,608	2649.5	− 2583	66.5	× 2381 / 18233	8.7
Sum, rounded to a whole point						62

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	50,792	2478.8	− 2432	46.8	× 2616 / 18721	6.5
4	50,793	2526.1	− 2473	53.1	× 2669 / 18721	7.6
5	50,794	2567.2	− 2502	65.2	× 2661 / 18721	9.3
6	50,795	2592.7	− 2531	61.7	× 2766 / 18721	9.1
7	50,796	2629.1	− 2552	77.1	× 2800 / 18721	11.5
8	50,797	2639.7	− 2567	72.7	× 2669 / 18721	10.4
11	50,798	2658.7	− 2583	75.7	× 2540 / 18721	10.3
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	49,527	2673.1	− 2583	90.1	× 2264 / 2264	90.1
Sum, rounded to a whole point						90

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	50,692	2477.4	− 2432	45.4	× 2689 / 19028	6.4
4	50,693	2527.3	− 2473	54.3	× 2764 / 19028	7.9
5	50,694	2566.8	− 2502	64.8	× 2793 / 19028	9.5
6	50,695	2590.6	− 2531	59.6	× 2861 / 19028	9
7	50,696	2621.1	− 2552	69.1	× 2702 / 19028	9.8
8	50,697	2629.6	− 2567	62.6	× 2730 / 19028	9
11	50,698	2665.2	− 2583	82.2	× 2489 / 19028	10.8
Sum, rounded to a whole point						62

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	50,648	2474.0	− 2432	42	× 2679 / 19424	5.8
4	50,649	2530.6	− 2473	57.6	× 2814 / 19424	8.3
5	50,650	2569.4	− 2502	67.4	× 2795 / 19424	9.7
6	50,651	2593.7	− 2531	62.7	× 2884 / 19424	9.3
7	50,652	2618.9	− 2552	66.9	× 2825 / 19424	9.7
8	50,653	2635.7	− 2567	68.7	× 2768 / 19424	9.8
11	50,654	2662.4	− 2583	79.4	× 2659 / 19424	10.9
Sum, rounded to a whole point						64

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	50,503	2465.7	− 2432	33.7	× 2819 / 20133	4.7
4	50,504	2523.6	− 2473	50.6	× 2822 / 20133	7.1
5	50,505	2567.5	− 2502	65.5	× 2964 / 20133	9.6
6	50,506	2594.5	− 2531	63.5	× 2934 / 20133	9.3
7	50,507	2615.7	− 2552	63.7	× 2906 / 20133	9.2
8	50,508	2628.3	− 2567	61.3	× 2936 / 20133	8.9
11	50,509	2642.1	− 2583	59.1	× 2752 / 20133	8.1
Sum, rounded to a whole point						57

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	50,261	2471.9	− 2432	39.9	× 2675 / 20293	5.3
4	50,262	2524.7	− 2473	51.7	× 2903 / 20293	7.4
5	50,263	2568.0	− 2502	66	× 2944 / 20293	9.6
6	50,264	2594.0	− 2531	63	× 3070 / 20293	9.5
7	50,265	2621.5	− 2552	69.5	× 2943 / 20293	10.1
8	50,266	2635.2	− 2567	68.2	× 2980 / 20293	10
11	50,267	2644.2	− 2583	61.2	× 2778 / 20293	8.4
Sum, rounded to a whole point						60

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 60, 66, 64, 62, 65, 90, 62, 64, 57, 60 → 65
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 6 · 2016→2017: 2 · 2017→2018: 2 · 2018→2019: 3 · 2019→2021: 25 · 2021→2022: 28 · 2022→2023: 2 · 2023→2024: 7 · 2024→2025: 3 → average 8.7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8.7 × 2.66 = 23.1. Upper limit 88.1, lower limit 41.9.

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.