Peggy Heller 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	43,982	2436.1	− 2432	4.1	× 72 / 285	1
4	43,983	2480.8	− 2473	7.8	× 82 / 285	2.2
5	43,986	2471.0	− 2502	−31	× 64 / 285	−7
6	43,987	2498.0	− 2531	−33	× 67 / 285	−7.8
Sum, rounded to a whole point						−11

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,678	2427.2	− 2432	−4.8	× 82 / 305	−1.3
4	40,680	2507.4	− 2473	34.4	× 73 / 305	8.2
5	40,681	2497.7	− 2502	−4.3	× 85 / 305	−1.2
6	40,683	2525.6	− 2531	−5.4	× 65 / 305	−1.2
Sum, rounded to a whole point						5

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,681	2443.0	− 2432	11	× 81 / 320	2.8
4	41,682	2503.9	− 2473	30.9	× 81 / 320	7.8
5	41,684	2491.1	− 2502	−10.9	× 76 / 320	−2.6
6	41,686	2539.3	− 2531	8.3	× 82 / 320	2.1
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	41,714	2469.0	− 2432	37	× 74 / 329	8.3
4	41,715	2473.5	− 2473	0.5	× 84 / 329	0.1
5	41,718	2523.8	− 2502	21.8	× 81 / 329	5.4
6	41,719	2522.1	− 2531	−8.9	× 90 / 329	−2.4
Sum, rounded to a whole point						11

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,853	2435.6	− 2432	3.6	× 75 / 406	0.7
4	41,854	2508.6	− 2473	35.6	× 78 / 406	6.8
5	41,855	2505.8	− 2502	3.8	× 87 / 406	0.8
6	41,856	2550.3	− 2531	19.3	× 82 / 406	3.9
7	41,857	2551.3	− 2552	−0.7	× 84 / 406	−0.1
Sum, rounded to a whole point						12

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,600	2432.0	− 2432	0	× 80 / 492	0
4	41,601	2489.0	− 2473	16	× 89 / 492	2.9
5	41,602	2506.5	− 2502	4.5	× 84 / 492	0.8
6	41,603	2516.0	− 2531	−15	× 71 / 492	−2.2
7	41,604	2562.3	− 2552	10.3	× 85 / 492	1.8
8	41,605	2563.5	− 2567	−3.5	× 83 / 492	−0.6
Sum, rounded to a whole point						3

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,631	2438.2	− 2432	6.2	× 73 / 491	0.9
4	41,632	2456.7	− 2473	−16.3	× 80 / 491	−2.7
5	41,633	2518.2	− 2502	16.2	× 89 / 491	2.9
6	41,634	2536.4	− 2531	5.4	× 85 / 491	0.9
7	41,635	2545.1	− 2552	−6.9	× 78 / 491	−1.1
8	41,636	2565.6	− 2567	−1.4	× 86 / 491	−0.2
Sum, rounded to a whole point						1

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,466	2404.9	− 2432	−27.1	× 60 / 472	−3.4
4	41,467	2460.2	− 2473	−12.8	× 73 / 472	−2
5	41,468	2483.8	− 2502	−18.2	× 82 / 472	−3.2
6	41,469	2522.5	− 2531	−8.5	× 91 / 472	−1.6
7	41,470	2550.7	− 2552	−1.3	× 88 / 472	−0.2
8	41,471	2533.8	− 2567	−33.2	× 78 / 472	−5.5
Sum, rounded to a whole point						−16

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,229	2386.8	− 2432	−45.2	× 78 / 489	−7.2
4	41,230	2452.8	− 2473	−20.2	× 62 / 489	−2.6
5	41,231	2456.5	− 2502	−45.5	× 81 / 489	−7.5
6	41,232	2509.2	− 2531	−21.8	× 87 / 489	−3.9
7	41,233	2564.4	− 2552	12.4	× 94 / 489	2.4
8	41,234	2567.3	− 2567	0.3	× 87 / 489	0.1
Sum, rounded to a whole point						−19

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −11, 5, 10, 11, 12, 3, 1, −16, −19 → −0.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 16 · 2016→2017: 5 · 2017→2018: 1 · 2018→2019: 1 · 2019→2022: 9 · 2022→2023: 2 · 2023→2024: 17 · 2024→2025: 3 → average 6.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.8 × 2.66 = 18.1. Upper limit 17.7, lower limit −18.5.

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.