William Land Elementary: english

The shaded band is this school'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	61,812	2407.4	− 2432	−24.6	× 69 / 213	−8
4	61,815	2425.3	− 2473	−47.7	× 52 / 213	−11.6
5	61,816	2477.7	− 2502	−24.3	× 55 / 213	−6.3
6	61,819	2518.2	− 2531	−12.8	× 37 / 213	−2.2
Sum, rounded to a whole point						−28

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,374	2432.1	− 2432	0.1	× 68 / 231	0
4	57,376	2478.8	− 2473	5.8	× 69 / 231	1.7
5	57,378	2466.3	− 2502	−35.7	× 48 / 231	−7.4
6	57,380	2525.9	− 2531	−5.1	× 46 / 231	−1
Sum, rounded to a whole point						−7

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,048	2443.9	− 2432	11.9	× 74 / 227	3.9
4	59,050	2482.0	− 2473	9	× 62 / 227	2.5
5	59,052	2537.8	− 2502	35.8	× 57 / 227	9
6	59,054	2501.2	− 2531	−29.8	× 34 / 227	−4.5
Sum, rounded to a whole point						11

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,163	2481.0	− 2432	49	× 55 / 242	11.1
4	59,166	2507.9	− 2473	34.9	× 71 / 242	10.2
5	59,167	2524.6	− 2502	22.6	× 62 / 242	5.8
6	59,170	2540.2	− 2531	9.2	× 54 / 242	2.1
Sum, rounded to a whole point						29

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,414	2465.4	− 2432	33.4	× 62 / 246	8.4
4	59,415	2535.4	− 2473	62.4	× 54 / 246	13.7
5	59,416	2536.9	− 2502	34.9	× 70 / 246	9.9
6	59,417	2550.9	− 2531	19.9	× 60 / 246	4.9
Sum, rounded to a whole point						37

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,497	2437.9	− 2432	5.9	× 59 / 210	1.7
4	59,498	2512.2	− 2473	39.2	× 49 / 210	9.1
5	59,499	2562.1	− 2502	60.1	× 57 / 210	16.3
6	59,500	2582.1	− 2531	51.1	× 45 / 210	11
Sum, rounded to a whole point						38

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,455	2431.6	− 2432	−0.4	× 43 / 204	−0.1
4	59,456	2529.7	− 2473	56.7	× 55 / 204	15.3
5	59,457	2554.7	− 2502	52.7	× 50 / 204	12.9
6	59,458	2599.5	− 2531	68.5	× 56 / 204	18.8
Sum, rounded to a whole point						47

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,386	2455.4	− 2432	23.4	× 46 / 184	5.9
4	59,387	2510.4	− 2473	37.4	× 37 / 184	7.5
5	59,388	2565.2	− 2502	63.2	× 54 / 184	18.5
6	59,389	2581.3	− 2531	50.3	× 47 / 184	12.8
Sum, rounded to a whole point						45

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,143	2478.8	− 2432	46.8	× 48 / 185	12.1
4	59,144	2524.0	− 2473	51	× 48 / 185	13.2
5	59,145	2555.0	− 2502	53	× 41 / 185	11.7
6	59,146	2606.2	− 2531	75.2	× 48 / 185	19.5
Sum, rounded to a whole point						57

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −28, −7, 11, 29, 37, 38, 47, 45, 57 → 25.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 21 · 2016→2017: 18 · 2017→2018: 18 · 2018→2019: 8 · 2019→2022: 1 · 2022→2023: 9 · 2023→2024: 2 · 2024→2025: 12 → average 11.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 11.1 × 2.66 = 29.5. Upper limit 54.9, lower limit −4.1.

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. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.