Lagunitas 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
6	42,034	2490.4	− 2531	−40.6	× 21 / 71	−12
7	42,035	2560.4	− 2552	8.4	× 32 / 71	3.8
8	42,038	2552.3	− 2567	−14.7	× 18 / 71	−3.7
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	38,863	2426.3	− 2432	−5.7	× 14 / 98	−0.8
6	38,870	2485.0	− 2531	−46	× 22 / 98	−10.3
7	38,872	2557.2	− 2552	5.2	× 27 / 98	1.4
8	38,873	2596.9	− 2567	29.9	× 35 / 98	10.7
Sum, rounded to a whole point						1

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	39,828	2538.2	− 2531	7.2	× 17 / 64	1.9
7	39,831	2532.5	− 2552	−19.5	× 22 / 64	−6.7
8	39,832	2536.7	− 2567	−30.3	× 25 / 64	−11.8
Sum, rounded to a whole point						−17

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,854	2455.4	− 2432	23.4	× 14 / 84	3.9
4	39,855	2466.7	− 2473	−6.3	× 13 / 84	−1
6	39,859	2495.5	− 2531	−35.5	× 12 / 84	−5.1
7	39,861	2570.6	− 2552	18.6	× 23 / 84	5.1
8	39,863	2567.4	− 2567	0.4	× 22 / 84	0.1
Sum, rounded to a whole point						3

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,005	2445.4	− 2432	13.4	× 17 / 100	2.3
4	40,006	2501.3	− 2473	28.3	× 12 / 100	3.4
6	40,008	2557.0	− 2531	26	× 28 / 100	7.3
7	40,009	2611.1	− 2552	59.1	× 20 / 100	11.8
8	40,010	2575.5	− 2567	8.5	× 23 / 100	2
Sum, rounded to a whole point						27

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	38,974	2434.7	− 2432	2.7	× 14 / 105	0.4
4	38,975	2527.3	− 2473	54.3	× 11 / 105	5.7
5	38,976	2516.4	− 2502	14.4	× 22 / 105	3
6	38,977	2539.4	− 2531	8.4	× 22 / 105	1.8
7	38,978	2581.6	− 2552	29.6	× 20 / 105	5.6
8	38,979	2564.2	− 2567	−2.8	× 16 / 105	−0.4
Sum, rounded to a whole point						16

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	39,796	2545.7	− 2502	43.7	× 15 / 82	8
6	39,797	2528.8	− 2531	−2.2	× 33 / 82	−0.9
7	39,798	2576.1	− 2552	24.1	× 19 / 82	5.6
8	39,799	2539.5	− 2567	−27.5	× 15 / 82	−5
Sum, rounded to a whole point						8

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,849	2400.7	− 2432	−31.3	× 11 / 73	−4.7
6	39,852	2543.1	− 2531	12.1	× 17 / 73	2.8
7	39,853	2604.3	− 2552	52.3	× 27 / 73	19.3
8	39,854	2613.2	− 2567	46.2	× 18 / 73	11.4
Sum, rounded to a whole point						29

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,662	2394.0	− 2432	−38	× 17 / 107	−6
4	39,663	2483.4	− 2473	10.4	× 13 / 107	1.3
6	39,665	2549.7	− 2531	18.7	× 25 / 107	4.4
7	39,666	2585.1	− 2552	33.1	× 19 / 107	5.9
8	39,667	2597.4	− 2567	30.4	× 33 / 107	9.4
Sum, rounded to a whole point						15

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,433	2415.1	− 2432	−16.9	× 12 / 101	−2
4	39,434	2461.9	− 2473	−11.1	× 20 / 101	−2.2
5	39,435	2571.1	− 2502	69.1	× 15 / 101	10.3
6	39,436	2576.9	− 2531	45.9	× 15 / 101	6.8
7	39,437	2613.7	− 2552	61.7	× 22 / 101	13.4
8	39,438	2582.1	− 2567	15.1	× 17 / 101	2.5
Sum, rounded to a whole point						29

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	39,358	2498.3	− 2473	25.3	× 12 / 97	3.1
5	39,359	2562.4	− 2502	60.4	× 19 / 97	11.8
6	39,360	2527.0	− 2531	−4	× 23 / 97	−0.9
7	39,361	2598.7	− 2552	46.7	× 16 / 97	7.7
8	39,362	2594.3	− 2567	27.3	× 27 / 97	7.6
Sum, rounded to a whole point						29

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −12, 1, −17, 3, 27, 16, 8, 29, 15, 29, 29 → 11.6
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: 18 · 2017→2018: 20 · 2018→2019: 24 · 2019→2021: 11 · 2021→2022: 8 · 2022→2023: 21 · 2023→2024: 14 · 2024→2025: 14 · 2025→2026: 0 → average 14.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 14.3 × 2.66 = 38. Upper limit 49.6, lower limit −26.4.

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.

Lagunitas Elementary