Lammersville Joint 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	81,387	2433.9	− 2432	1.9	× 330 / 1937	0.3
4	81,388	2471.8	− 2473	−1.2	× 357 / 1937	−0.2
5	81,391	2518.8	− 2502	16.8	× 325 / 1937	2.8
6	81,392	2536.5	− 2531	5.5	× 323 / 1937	0.9
7	81,395	2574.2	− 2552	22.2	× 321 / 1937	3.7
8	81,396	2590.8	− 2567	23.8	× 281 / 1937	3.5
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	75,433	2443.7	− 2432	11.7	× 370 / 2268	1.9
4	75,435	2478.2	− 2473	5.2	× 348 / 2268	0.8
5	75,436	2525.6	− 2502	23.6	× 358 / 2268	3.7
6	75,438	2556.9	− 2531	25.9	× 339 / 2268	3.9
7	75,440	2580.1	− 2552	28.1	× 331 / 2268	4.1
8	75,442	2593.9	− 2567	26.9	× 326 / 2268	3.9
11	75,445	2645.2	− 2583	62.2	× 196 / 2268	5.4
Sum, rounded to a whole point						24

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,447	2447.1	− 2432	15.1	× 396 / 2533	2.4
4	77,450	2487.0	− 2473	14	× 409 / 2533	2.3
5	77,452	2530.6	− 2502	28.6	× 386 / 2533	4.4
6	77,454	2570.0	− 2531	39	× 393 / 2533	6.1
7	77,455	2597.1	− 2552	45.1	× 356 / 2533	6.3
8	77,457	2616.5	− 2567	49.5	× 338 / 2533	6.6
11	77,459	2651.6	− 2583	68.6	× 255 / 2533	6.9
Sum, rounded to a whole point						35

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,631	2457.2	− 2432	25.2	× 399 / 2698	3.7
4	77,632	2490.0	− 2473	17	× 419 / 2698	2.6
5	77,635	2541.2	− 2502	39.2	× 440 / 2698	6.4
6	77,636	2566.7	− 2531	35.7	× 397 / 2698	5.3
7	77,639	2594.2	− 2552	42.2	× 398 / 2698	6.2
8	77,640	2616.0	− 2567	49	× 375 / 2698	6.8
11	77,643	2655.1	− 2583	72.1	× 270 / 2698	7.2
Sum, rounded to a whole point						38

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	78,146	2463.7	− 2432	31.7	× 456 / 3032	4.8
4	78,147	2506.2	− 2473	33.2	× 446 / 3032	4.9
5	78,148	2543.8	− 2502	41.8	× 460 / 3032	6.3
6	78,149	2579.0	− 2531	48	× 495 / 3032	7.8
7	78,150	2600.5	− 2552	48.5	× 414 / 3032	6.6
8	78,151	2616.8	− 2567	49.8	× 435 / 3032	7.1
11	78,152	2644.6	− 2583	61.6	× 326 / 3032	6.6
Sum, rounded to a whole point						44

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	76,685	2655.9	− 2583	72.9	× 387 / 387	72.9
Sum, rounded to a whole point						73

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	78,292	2460.1	− 2432	28.1	× 599 / 3940	4.3
4	78,293	2515.7	− 2473	42.7	× 590 / 3940	6.4
5	78,294	2554.2	− 2502	52.2	× 599 / 3940	7.9
6	78,295	2590.6	− 2531	59.6	× 598 / 3940	9
7	78,296	2624.0	− 2552	72	× 528 / 3940	9.6
8	78,297	2632.6	− 2567	65.6	× 569 / 3940	9.5
11	78,298	2657.1	− 2583	74.1	× 457 / 3940	8.6
Sum, rounded to a whole point						55

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	78,284	2461.3	− 2432	29.3	× 552 / 4088	4
4	78,285	2515.4	− 2473	42.4	× 639 / 4088	6.6
5	78,286	2556.7	− 2502	54.7	× 625 / 4088	8.4
6	78,287	2585.8	− 2531	54.8	× 634 / 4088	8.5
7	78,288	2620.1	− 2552	68.1	× 607 / 4088	10.1
8	78,289	2634.1	− 2567	67.1	× 570 / 4088	9.4
11	78,290	2658.4	− 2583	75.4	× 461 / 4088	8.5
Sum, rounded to a whole point						55

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	78,300	2466.4	− 2432	34.4	× 564 / 4263	4.6
4	78,301	2515.9	− 2473	42.9	× 568 / 4263	5.7
5	78,302	2560.4	− 2502	58.4	× 639 / 4263	8.8
6	78,303	2596.1	− 2531	65.1	× 654 / 4263	10
7	78,304	2629.0	− 2552	77	× 663 / 4263	12
8	78,305	2636.4	− 2567	69.4	× 617 / 4263	10
11	78,306	2650.3	− 2583	67.3	× 558 / 4263	8.8
Sum, rounded to a whole point						60

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,968	2473.9	− 2432	41.9	× 577 / 4339	5.6
4	77,969	2522.7	− 2473	49.7	× 591 / 4339	6.8
5	77,970	2566.8	− 2502	64.8	× 604 / 4339	9
6	77,971	2600.9	− 2531	69.9	× 659 / 4339	10.6
7	77,972	2630.6	− 2552	78.6	× 665 / 4339	12
8	77,973	2652.3	− 2567	85.3	× 686 / 4339	13.5
11	77,974	2671.6	− 2583	88.6	× 557 / 4339	11.4
Sum, rounded to a whole point						69

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 11, 24, 35, 38, 44, 73, 55, 55, 60, 69 → 46.4
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: 11 · 2017→2018: 3 · 2018→2019: 6 · 2019→2021: 29 · 2021→2022: 18 · 2022→2023: 0 · 2023→2024: 5 · 2024→2025: 9 → average 10.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.4 × 2.66 = 27.7. Upper limit 74.1, lower limit 18.7.

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.