Harry Dewey Fundamental Elementary: math

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	62,418	2449.7	− 2436	13.7	× 87 / 314	3.8
4	62,420	2461.6	− 2485	−23.4	× 92 / 314	−6.9
5	62,422	2470.4	− 2528	−57.6	× 71 / 314	−13
6	62,424	2537.9	− 2552	−14.1	× 64 / 314	−2.9
Sum, rounded to a whole point						−19

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,912	2441.2	− 2436	5.2	× 64 / 313	1.1
4	57,914	2482.1	− 2485	−2.9	× 88 / 313	−0.8
5	57,916	2481.0	− 2528	−47	× 100 / 313	−15
6	57,917	2516.3	− 2552	−35.7	× 61 / 313	−7
Sum, rounded to a whole point						−22

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,607	2449.3	− 2436	13.3	× 79 / 324	3.2
4	59,609	2481.7	− 2485	−3.3	× 69 / 324	−0.7
5	59,610	2497.3	− 2528	−30.7	× 92 / 324	−8.7
6	59,613	2537.4	− 2552	−14.6	× 84 / 324	−3.8
Sum, rounded to a whole point						−10

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,723	2438.1	− 2436	2.1	× 64 / 281	0.5
4	59,726	2509.4	− 2485	24.4	× 77 / 281	6.7
5	59,727	2496.2	− 2528	−31.8	× 67 / 281	−7.6
6	59,730	2516.0	− 2552	−36	× 73 / 281	−9.4
Sum, rounded to a whole point						−10

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,981	2446.8	− 2436	10.8	× 76 / 275	3
4	59,982	2495.7	− 2485	10.7	× 66 / 275	2.6
5	59,983	2529.7	− 2528	1.7	× 75 / 275	0.5
6	59,984	2541.1	− 2552	−10.9	× 58 / 275	−2.3
Sum, rounded to a whole point						4

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,049	2439.1	− 2436	3.1	× 50 / 203	0.8
4	60,050	2504.3	− 2485	19.3	× 48 / 203	4.6
5	60,051	2482.9	− 2528	−45.1	× 40 / 203	−8.9
6	60,052	2517.6	− 2552	−34.4	× 65 / 203	−11
Sum, rounded to a whole point						−15

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,004	2419.8	− 2436	−16.2	× 56 / 213	−4.3
4	60,005	2476.8	− 2485	−8.2	× 57 / 213	−2.2
5	60,006	2494.2	− 2528	−33.8	× 55 / 213	−8.7
6	60,007	2485.2	− 2552	−66.8	× 45 / 213	−14.1
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	59,929	2415.2	− 2436	−20.8	× 57 / 216	−5.5
4	59,930	2456.2	− 2485	−28.8	× 57 / 216	−7.6
5	59,931	2453.2	− 2528	−74.8	× 58 / 216	−20.1
6	59,932	2545.7	− 2552	−6.3	× 44 / 216	−1.3
Sum, rounded to a whole point						−34

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,690	2431.9	− 2436	−4.1	× 55 / 228	−1
4	59,691	2471.7	− 2485	−13.3	× 58 / 228	−3.4
5	59,692	2467.9	− 2528	−60.1	× 60 / 228	−15.8
6	59,693	2500.7	− 2552	−51.3	× 55 / 228	−12.4
Sum, rounded to a whole point						−33

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −19, −22, −10, −10, 4, −15, −29, −34, −33 → −18.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 3 · 2016→2017: 12 · 2017→2018: 0 · 2018→2019: 14 · 2019→2022: 19 · 2022→2023: 14 · 2023→2024: 5 · 2024→2025: 1 → average 8.5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8.5 × 2.66 = 22.6. Upper limit 3.9, lower limit −41.3.

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.