Las Virgenes 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	25,196	2471.9	− 2436	35.9	× 737 / 5343	5
4	25,198	2502.7	− 2485	17.7	× 738 / 5343	2.4
5	25,200	2534.8	− 2528	6.8	× 784 / 5343	1
6	25,202	2553.1	− 2552	1.1	× 894 / 5343	0.2
7	25,204	2575.0	− 2567	8	× 873 / 5343	1.3
8	25,206	2593.7	− 2586	7.7	× 866 / 5343	1.2
11	25,208	2635.0	− 2628	7	× 451 / 5343	0.6
Sum, rounded to a whole point						12

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,458	2469.4	− 2436	33.4	× 718 / 5835	4.1
4	23,459	2514.8	− 2485	29.8	× 771 / 5835	3.9
5	23,462	2545.4	− 2528	17.4	× 778 / 5835	2.3
6	23,464	2559.6	− 2552	7.6	× 901 / 5835	1.2
7	23,465	2583.3	− 2567	16.3	× 907 / 5835	2.5
8	23,467	2598.6	− 2586	12.6	× 848 / 5835	1.8
11	23,469	2612.0	− 2628	−16	× 912 / 5835	−2.5
Sum, rounded to a whole point						13

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,923	2473.1	− 2436	37.1	× 698 / 5836	4.4
4	23,925	2513.0	− 2485	28	× 739 / 5836	3.5
5	23,926	2545.2	− 2528	17.2	× 773 / 5836	2.3
6	23,929	2567.1	− 2552	15.1	× 873 / 5836	2.3
7	23,931	2583.0	− 2567	16	× 896 / 5836	2.5
8	23,933	2602.3	− 2586	16.3	× 895 / 5836	2.5
11	23,934	2613.6	− 2628	−14.4	× 962 / 5836	−2.4
Sum, rounded to a whole point						15

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,944	2468.5	− 2436	32.5	× 708 / 5732	4
4	23,946	2514.5	− 2485	29.5	× 725 / 5732	3.7
5	23,948	2539.3	− 2528	11.3	× 741 / 5732	1.5
6	23,950	2564.6	− 2552	12.6	× 883 / 5732	1.9
7	23,952	2587.9	− 2567	20.9	× 874 / 5732	3.2
8	23,954	2597.4	− 2586	11.4	× 879 / 5732	1.7
11	23,956	2601.9	− 2628	−26.1	× 922 / 5732	−4.2
Sum, rounded to a whole point						12

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,123	2470.3	− 2436	34.3	× 697 / 5654	4.2
4	24,124	2514.4	− 2485	29.4	× 732 / 5654	3.8
5	24,125	2539.1	− 2528	11.1	× 722 / 5654	1.4
6	24,126	2561.8	− 2552	9.8	× 870 / 5654	1.5
7	24,127	2584.2	− 2567	17.2	× 871 / 5654	2.6
8	24,128	2595.2	− 2586	9.2	× 872 / 5654	1.4
11	24,129	2617.0	− 2628	−11	× 890 / 5654	−1.7
Sum, rounded to a whole point						13

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,434	2478.3	− 2436	42.3	× 478 / 2999	6.7
4	23,435	2504.6	− 2485	19.6	× 520 / 2999	3.4
5	23,436	2534.7	− 2528	6.7	× 552 / 2999	1.2
6	23,437	2531.6	− 2552	−20.4	× 488 / 2999	−3.3
7	23,438	2557.4	− 2567	−9.6	× 421 / 2999	−1.3
8	23,439	2579.8	− 2586	−6.2	× 446 / 2999	−0.9
11	23,440	2587.1	− 2628	−40.9	× 94 / 2999	−1.3
Sum, rounded to a whole point						5

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,082	2473.2	− 2436	37.2	× 635 / 4712	5
4	24,083	2514.4	− 2485	29.4	× 651 / 4712	4.1
5	24,084	2537.6	− 2528	9.6	× 685 / 4712	1.4
6	24,085	2555.8	− 2552	3.8	× 712 / 4712	0.6
7	24,086	2560.2	− 2567	−6.8	× 730 / 4712	−1.1
8	24,087	2564.9	− 2586	−21.1	× 696 / 4712	−3.1
11	24,088	2603.6	− 2628	−24.4	× 603 / 4712	−3.1
Sum, rounded to a whole point						4

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,039	2473.7	− 2436	37.7	× 605 / 4897	4.7
4	24,040	2516.7	− 2485	31.7	× 637 / 4897	4.1
5	24,041	2535.1	− 2528	7.1	× 655 / 4897	0.9
6	24,042	2547.2	− 2552	−4.8	× 703 / 4897	−0.7
7	24,043	2582.5	− 2567	15.5	× 720 / 4897	2.3
8	24,044	2561.9	− 2586	−24.1	× 739 / 4897	−3.6
11	24,045	2598.5	− 2628	−29.5	× 838 / 4897	−5
Sum, rounded to a whole point						3

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,889	2472.5	− 2436	36.5	× 594 / 4824	4.5
4	23,890	2516.3	− 2485	31.3	× 610 / 4824	4
5	23,891	2537.9	− 2528	9.9	× 646 / 4824	1.3
6	23,892	2560.2	− 2552	8.2	× 713 / 4824	1.2
7	23,893	2585.6	− 2567	18.6	× 717 / 4824	2.8
8	23,894	2609.9	− 2586	23.9	× 734 / 4824	3.6
11	23,895	2606.6	− 2628	−21.4	× 810 / 4824	−3.6
Sum, rounded to a whole point						14

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,776	2472.0	− 2436	36	× 608 / 4785	4.6
4	23,777	2521.0	− 2485	36	× 612 / 4785	4.6
5	23,778	2542.9	− 2528	14.9	× 610 / 4785	1.9
6	23,779	2565.5	− 2552	13.5	× 755 / 4785	2.1
7	23,780	2592.4	− 2567	25.4	× 734 / 4785	3.9
8	23,781	2613.7	− 2586	27.7	× 725 / 4785	4.2
11	23,782	2597.5	− 2628	−30.5	× 741 / 4785	−4.7
Sum, rounded to a whole point						17

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 12, 13, 15, 12, 13, 5, 4, 3, 14, 17 → 10.8
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: 2 · 2017→2018: 3 · 2018→2019: 1 · 2019→2021: 8 · 2021→2022: 1 · 2022→2023: 1 · 2023→2024: 11 · 2024→2025: 3 → average 3.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 3.4 × 2.66 = 9. Upper limit 19.8, lower limit 1.8.

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.