John Adams 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	55,817	2452.6	− 2436	16.6	× 88 / 382	3.8
4	55,819	2450.2	− 2485	−34.8	× 94 / 382	−8.6
5	55,821	2465.5	− 2528	−62.5	× 103 / 382	−16.9
6	55,823	2499.6	− 2552	−52.4	× 97 / 382	−13.3
Sum, rounded to a whole point						−35

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	51,816	2447.9	− 2436	11.9	× 134 / 422	3.8
4	51,817	2467.3	− 2485	−17.7	× 92 / 422	−3.9
5	51,820	2486.7	− 2528	−41.3	× 90 / 422	−8.8
6	51,821	2508.5	− 2552	−43.5	× 106 / 422	−10.9
Sum, rounded to a whole point						−20

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	53,338	2463.4	− 2436	27.4	× 93 / 405	6.3
4	53,341	2457.6	− 2485	−27.4	× 133 / 405	−9
5	53,343	2486.6	− 2528	−41.4	× 91 / 405	−9.3
6	53,345	2525.9	− 2552	−26.1	× 88 / 405	−5.7
Sum, rounded to a whole point						−18

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	53,428	2450.1	− 2436	14.1	× 79 / 379	2.9
4	53,430	2476.5	− 2485	−8.5	× 87 / 379	−2
5	53,432	2477.3	− 2528	−50.7	× 125 / 379	−16.7
6	53,434	2513.7	− 2552	−38.3	× 88 / 379	−8.9
Sum, rounded to a whole point						−25

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	53,663	2452.4	− 2436	16.4	× 110 / 407	4.4
4	53,664	2450.9	− 2485	−34.1	× 75 / 407	−6.3
5	53,665	2486.4	− 2528	−41.6	× 99 / 407	−10.1
6	53,666	2509.7	− 2552	−42.3	× 123 / 407	−12.8
Sum, rounded to a whole point						−25

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	53,719	2401.3	− 2436	−34.7	× 96 / 384	−8.7
4	53,720	2400.3	− 2485	−84.7	× 71 / 384	−15.7
5	53,721	2443.1	− 2528	−84.9	× 112 / 384	−24.8
6	53,722	2487.9	− 2552	−64.1	× 105 / 384	−17.5
Sum, rounded to a whole point						−67

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	53,670	2417.6	− 2436	−18.4	× 67 / 350	−3.5
4	53,671	2423.5	− 2485	−61.5	× 92 / 350	−16.2
5	53,672	2413.1	− 2528	−114.9	× 75 / 350	−24.6
6	53,673	2484.1	− 2552	−67.9	× 116 / 350	−22.5
Sum, rounded to a whole point						−67

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	53,528	2402.3	− 2436	−33.7	× 79 / 306	−8.7
4	53,529	2443.5	− 2485	−41.5	× 64 / 306	−8.7
5	53,530	2427.1	− 2528	−100.9	× 89 / 306	−29.3
6	53,531	2449.6	− 2552	−102.4	× 74 / 306	−24.8
Sum, rounded to a whole point						−71

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	53,266	2419.2	− 2436	−16.8	× 72 / 298	−4.1
4	53,267	2427.2	− 2485	−57.8	× 76 / 298	−14.7
5	53,268	2447.8	− 2528	−80.2	× 65 / 298	−17.5
6	53,269	2454.7	− 2552	−97.3	× 85 / 298	−27.8
Sum, rounded to a whole point						−64

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −35, −20, −18, −25, −25, −67, −67, −71, −64 → −43.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 15 · 2016→2017: 2 · 2017→2018: 7 · 2018→2019: 0 · 2019→2022: 42 · 2022→2023: 0 · 2023→2024: 4 · 2024→2025: 7 → average 9.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.6 × 2.66 = 25.5. Upper limit −18.1, lower limit −69.1.

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.