Los Altos Elementary: 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	87,592	2498.3	− 2432	66.3	× 484 / 3196	10
4	87,594	2557.6	− 2473	84.6	× 531 / 3196	14.1
5	87,596	2603.5	− 2502	101.5	× 531 / 3196	16.9
6	87,598	2608.9	− 2531	77.9	× 520 / 3196	12.7
7	87,600	2639.7	− 2552	87.7	× 581 / 3196	15.9
8	87,602	2657.4	− 2567	90.4	× 549 / 3196	15.5
Sum, rounded to a whole point						85

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,293	2498.4	− 2432	66.4	× 478 / 3228	9.8
4	81,295	2563.6	− 2473	90.6	× 512 / 3228	14.4
5	81,297	2598.3	− 2502	96.3	× 541 / 3228	16.1
6	81,300	2624.7	− 2531	93.7	× 540 / 3228	15.7
7	81,302	2646.0	− 2552	94	× 573 / 3228	16.7
8	81,304	2656.6	− 2567	89.6	× 584 / 3228	16.2
Sum, rounded to a whole point						89

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,542	2495.5	− 2432	63.5	× 503 / 3158	10.1
4	83,543	2553.9	− 2473	80.9	× 470 / 3158	12
5	83,546	2593.7	− 2502	91.7	× 525 / 3158	15.2
6	83,548	2621.4	− 2531	90.4	× 526 / 3158	15.1
7	83,549	2641.7	− 2552	89.7	× 560 / 3158	15.9
8	83,552	2658.5	− 2567	91.5	× 574 / 3158	16.6
Sum, rounded to a whole point						85

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,768	2490.7	− 2432	58.7	× 438 / 3052	8.4
4	83,770	2559.1	− 2473	86.1	× 521 / 3052	14.7
5	83,772	2594.5	− 2502	92.5	× 474 / 3052	14.4
6	83,774	2620.9	− 2531	89.9	× 502 / 3052	14.8
7	83,776	2639.7	− 2552	87.7	× 557 / 3052	16
8	83,778	2660.3	− 2567	93.3	× 560 / 3052	17.1
Sum, rounded to a whole point						85

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,375	2496.6	− 2432	64.6	× 425 / 2905	9.5
4	84,376	2548.8	− 2473	75.8	× 439 / 2905	11.5
5	84,377	2604.5	− 2502	102.5	× 521 / 2905	18.4
6	84,378	2625.5	− 2531	94.5	× 457 / 2905	14.9
7	84,379	2659.9	− 2552	107.9	× 521 / 2905	19.4
8	84,380	2664.8	− 2567	97.8	× 542 / 2905	18.2
Sum, rounded to a whole point						92

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,550	2505.3	− 2432	73.3	× 319 / 2374	9.8
4	84,551	2563.4	− 2473	90.4	× 391 / 2374	14.9
5	84,552	2587.4	− 2502	85.4	× 356 / 2374	12.8
6	84,553	2618.1	− 2531	87.1	× 412 / 2374	15.1
7	84,554	2651.5	− 2552	99.5	× 426 / 2374	17.9
8	84,555	2662.5	− 2567	95.5	× 470 / 2374	18.9
Sum, rounded to a whole point						89

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,489	2506.7	− 2432	74.7	× 346 / 2353	11
4	84,490	2549.0	− 2473	76	× 338 / 2353	10.9
5	84,491	2598.1	− 2502	96.1	× 405 / 2353	16.5
6	84,492	2623.6	− 2531	92.6	× 368 / 2353	14.5
7	84,493	2641.8	− 2552	89.8	× 453 / 2353	17.3
8	84,494	2655.6	− 2567	88.6	× 443 / 2353	16.7
Sum, rounded to a whole point						87

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,482	2502.6	− 2432	70.6	× 295 / 2282	9.1
4	84,483	2552.5	− 2473	79.5	× 362 / 2282	12.6
5	84,484	2593.4	− 2502	91.4	× 358 / 2282	14.3
6	84,485	2635.1	− 2531	104.1	× 391 / 2282	17.8
7	84,486	2650.0	− 2552	98	× 419 / 2282	18
8	84,487	2648.7	− 2567	81.7	× 457 / 2282	16.4
Sum, rounded to a whole point						88

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,170	2508.7	− 2432	76.7	× 338 / 2276	11.4
4	84,171	2545.6	− 2473	72.6	× 308 / 2276	9.8
5	84,172	2599.7	− 2502	97.7	× 375 / 2276	16.1
6	84,173	2636.0	− 2531	105	× 367 / 2276	16.9
7	84,174	2658.8	− 2552	106.8	× 454 / 2276	21.3
8	84,175	2659.6	− 2567	92.6	× 434 / 2276	17.7
Sum, rounded to a whole point						93

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,947	2507.4	− 2432	75.4	× 289 / 2210	9.9
4	83,948	2561.5	− 2473	88.5	× 359 / 2210	14.4
5	83,949	2598.2	− 2502	96.2	× 323 / 2210	14.1
6	83,950	2632.7	− 2531	101.7	× 387 / 2210	17.8
7	83,951	2655.0	− 2552	103	× 406 / 2210	18.9
8	83,952	2677.1	− 2567	110.1	× 446 / 2210	22.2
Sum, rounded to a whole point						97

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 85, 89, 85, 85, 92, 89, 87, 88, 93, 97 → 89
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: 4 · 2017→2018: 0 · 2018→2019: 7 · 2019→2022: 3 · 2022→2023: 2 · 2023→2024: 1 · 2024→2025: 5 · 2025→2026: 4 → average 3.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 3.3 × 2.66 = 8.8. Upper limit 97.8, lower limit 80.2.

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.

Los Altos Elementary