Atwater Avenue 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	29,395	2391.9	− 2432	−40.1	× 44 / 172	−10.3
4	29,397	2414.2	− 2473	−58.8	× 47 / 172	−16.1
5	29,399	2456.9	− 2502	−45.1	× 40 / 172	−10.5
6	29,401	2495.5	− 2531	−35.5	× 41 / 172	−8.5
Sum, rounded to a whole point						−45

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	27,618	2389.6	− 2432	−42.4	× 47 / 166	−12
4	27,619	2435.2	− 2473	−37.8	× 39 / 166	−8.9
5	27,622	2461.3	− 2502	−40.7	× 49 / 166	−12
6	27,623	2509.6	− 2531	−21.4	× 31 / 166	−4
Sum, rounded to a whole point						−37

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	28,188	2382.0	− 2432	−50	× 44 / 161	−13.7
4	28,190	2432.5	− 2473	−40.5	× 44 / 161	−11.1
5	28,192	2462.0	− 2502	−40	× 36 / 161	−8.9
6	28,195	2471.6	− 2531	−59.4	× 37 / 161	−13.7
Sum, rounded to a whole point						−47

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	28,239	2397.4	− 2432	−34.6	× 42 / 157	−9.3
4	28,241	2422.5	− 2473	−50.5	× 45 / 157	−14.5
5	28,243	2450.2	− 2502	−51.8	× 44 / 157	−14.5
6	28,245	2493.2	− 2531	−37.8	× 26 / 157	−6.3
Sum, rounded to a whole point						−45

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	28,415	2383.7	− 2432	−48.3	× 27 / 139	−9.4
4	28,416	2445.2	− 2473	−27.8	× 39 / 139	−7.8
5	28,417	2470.7	− 2502	−31.3	× 40 / 139	−9
6	28,418	2513.2	− 2531	−17.8	× 33 / 139	−4.2
Sum, rounded to a whole point						−30

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	28,450	2415.1	− 2432	−16.9	× 45 / 134	−5.7
4	28,451	2404.6	− 2473	−68.4	× 44 / 134	−22.5
5	28,452	2478.0	− 2502	−24	× 31 / 134	−5.6
6	28,453	2532.9	− 2531	1.9	× 14 / 134	0.2
Sum, rounded to a whole point						−33

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	28,511	2452.7	− 2432	20.7	× 30 / 143	4.3
4	28,512	2450.1	− 2473	−22.9	× 42 / 143	−6.7
5	28,513	2477.3	− 2502	−24.7	× 42 / 143	−7.3
6	28,514	2524.1	− 2531	−6.9	× 29 / 143	−1.4
Sum, rounded to a whole point						−11

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	28,377	2425.6	− 2432	−6.4	× 48 / 146	−2.1
4	28,378	2470.3	− 2473	−2.7	× 32 / 146	−0.6
5	28,379	2491.8	− 2502	−10.2	× 42 / 146	−2.9
6	28,380	2457.4	− 2531	−73.6	× 24 / 146	−12.1
Sum, rounded to a whole point						−18

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	28,240	2442.0	− 2432	10	× 44 / 149	3
4	28,241	2481.3	− 2473	8.3	× 43 / 149	2.4
5	28,242	2540.2	− 2502	38.2	× 35 / 149	9
6	28,243	2521.0	− 2531	−10	× 27 / 149	−1.8
Sum, rounded to a whole point						13

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −45, −37, −47, −45, −30, −33, −11, −18, 13 → −28.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 8 · 2016→2017: 10 · 2017→2018: 2 · 2018→2019: 15 · 2019→2022: 3 · 2022→2023: 22 · 2023→2024: 7 · 2024→2025: 31 → average 12.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 12.3 × 2.66 = 32.7. Upper limit 4.6, lower limit −60.8.

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.