Dickison 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	38,967	2373.6	− 2432	−58.4	× 145 / 403	−21
4	38,969	2417.9	− 2473	−55.1	× 140 / 403	−19.1
5	38,971	2469.8	− 2502	−32.2	× 118 / 403	−9.4
Sum, rounded to a whole point						−50

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,135	2369.9	− 2432	−62.1	× 135 / 486	−17.3
4	36,137	2410.3	− 2473	−62.7	× 144 / 486	−18.6
5	36,139	2467.1	− 2502	−34.9	× 141 / 486	−10.1
6	36,141	2536.0	− 2531	5	× 66 / 486	0.7
Sum, rounded to a whole point						−45

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,878	2391.1	− 2432	−40.9	× 123 / 528	−9.5
4	36,881	2398.3	− 2473	−74.7	× 131 / 528	−18.5
5	36,882	2448.7	− 2502	−53.3	× 145 / 528	−14.6
6	36,885	2514.7	− 2531	−16.3	× 73 / 528	−2.3
7	36,886	2571.5	− 2552	19.5	× 56 / 528	2.1
Sum, rounded to a whole point						−43

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,847	2414.9	− 2432	−17.1	× 104 / 482	−3.7
4	36,848	2418.5	− 2473	−54.5	× 116 / 482	−13.1
5	36,851	2436.3	− 2502	−65.7	× 133 / 482	−18.1
6	36,852	2514.4	− 2531	−16.6	× 59 / 482	−2
7	36,855	2549.6	− 2552	−2.4	× 43 / 482	−0.2
8	36,856	2599.9	− 2567	32.9	× 27 / 482	1.8
Sum, rounded to a whole point						−35

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,031	2408.8	− 2432	−23.2	× 100 / 442	−5.2
4	37,032	2431.6	− 2473	−41.4	× 99 / 442	−9.3
5	37,033	2463.1	− 2502	−38.9	× 104 / 442	−9.2
6	37,034	2465.3	− 2531	−65.7	× 70 / 442	−10.4
7	37,035	2561.2	− 2552	9.2	× 36 / 442	0.7
8	37,036	2574.4	− 2567	7.4	× 33 / 442	0.6
Sum, rounded to a whole point						−33

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,948	2422.1	− 2432	−9.9	× 96 / 396	−2.4
4	36,949	2465.6	− 2473	−7.4	× 98 / 396	−1.8
5	36,950	2459.9	− 2502	−42.1	× 101 / 396	−10.7
6	36,951	2495.6	− 2531	−35.4	× 34 / 396	−3
7	36,952	2509.0	− 2552	−43	× 33 / 396	−3.6
8	36,953	2540.6	− 2567	−26.4	× 34 / 396	−2.3
Sum, rounded to a whole point						−24

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,981	2422.5	− 2432	−9.5	× 79 / 362	−2.1
4	36,982	2442.5	− 2473	−30.5	× 98 / 362	−8.3
5	36,983	2466.5	− 2502	−35.5	× 95 / 362	−9.3
6	36,984	2466.8	− 2531	−64.2	× 31 / 362	−5.5
7	36,985	2545.2	− 2552	−6.8	× 30 / 362	−0.6
8	36,986	2533.2	− 2567	−33.8	× 29 / 362	−2.7
Sum, rounded to a whole point						−28

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,831	2402.8	− 2432	−29.2	× 99 / 372	−7.8
4	36,832	2423.6	− 2473	−49.4	× 76 / 372	−10.1
5	36,833	2455.2	− 2502	−46.8	× 108 / 372	−13.6
6	36,834	2496.0	− 2531	−35	× 33 / 372	−3.1
7	36,835	2485.5	− 2552	−66.5	× 30 / 372	−5.4
8	36,836	2527.0	− 2567	−40	× 26 / 372	−2.8
Sum, rounded to a whole point						−43

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,666	2447.5	− 2432	15.5	× 89 / 350	3.9
4	36,667	2456.9	− 2473	−16.1	× 92 / 350	−4.2
5	36,668	2500.5	− 2502	−1.5	× 69 / 350	−0.3
6	36,669	2505.7	− 2531	−25.3	× 47 / 350	−3.4
7	36,670	2571.2	− 2552	19.2	× 32 / 350	1.8
8	36,671	2558.5	− 2567	−8.5	× 21 / 350	−0.5
Sum, rounded to a whole point						−3

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −50, −45, −43, −35, −33, −24, −28, −43, −3 → −33.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 5 · 2016→2017: 2 · 2017→2018: 8 · 2018→2019: 2 · 2019→2022: 9 · 2022→2023: 4 · 2023→2024: 15 · 2024→2025: 40 → average 10.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.6 × 2.66 = 28.2. Upper limit −5.6, lower limit −62.

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.