Sutterville 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	61,782	2402.4	− 2432	−29.6	× 103 / 385	−7.9
4	61,785	2450.9	− 2473	−22.1	× 91 / 385	−5.2
5	61,786	2461.3	− 2502	−40.7	× 95 / 385	−10
6	61,789	2536.1	− 2531	5.1	× 96 / 385	1.3
Sum, rounded to a whole point						−22

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,343	2434.9	− 2432	2.9	× 82 / 360	0.7
4	57,345	2452.2	− 2473	−20.8	× 94 / 360	−5.4
5	57,348	2489.0	− 2502	−13	× 89 / 360	−3.2
6	57,350	2517.1	− 2531	−13.9	× 95 / 360	−3.7
Sum, rounded to a whole point						−12

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,018	2420.0	− 2432	−12	× 51 / 325	−1.9
4	59,021	2469.3	− 2473	−3.7	× 89 / 325	−1
5	59,022	2476.4	− 2502	−25.6	× 91 / 325	−7.2
6	59,025	2529.9	− 2531	−1.1	× 94 / 325	−0.3
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	59,134	2426.4	− 2432	−5.6	× 67 / 296	−1.3
4	59,135	2449.9	− 2473	−23.1	× 59 / 296	−4.6
5	59,138	2501.7	− 2502	−0.3	× 83 / 296	−0.1
6	59,139	2518.6	− 2531	−12.4	× 87 / 296	−3.6
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	59,384	2462.4	− 2432	30.4	× 69 / 292	7.2
4	59,385	2477.6	− 2473	4.6	× 78 / 292	1.2
5	59,386	2476.1	− 2502	−25.9	× 55 / 292	−4.9
6	59,387	2556.1	− 2531	25.1	× 90 / 292	7.7
Sum, rounded to a whole point						11

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,467	2475.5	− 2432	43.5	× 65 / 241	11.7
4	59,468	2513.3	− 2473	40.3	× 64 / 241	10.7
5	59,469	2526.7	− 2502	24.7	× 55 / 241	5.6
6	59,470	2579.2	− 2531	48.2	× 57 / 241	11.4
Sum, rounded to a whole point						39

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,425	2439.6	− 2432	7.6	× 60 / 244	1.9
4	59,426	2504.2	− 2473	31.2	× 64 / 244	8.2
5	59,427	2549.6	− 2502	47.6	× 64 / 244	12.5
6	59,428	2568.0	− 2531	37	× 56 / 244	8.5
Sum, rounded to a whole point						31

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,356	2470.9	− 2432	38.9	× 55 / 245	8.7
4	59,357	2469.1	− 2473	−3.9	× 64 / 245	−1
5	59,358	2545.8	− 2502	43.8	× 64 / 245	11.4
6	59,359	2576.9	− 2531	45.9	× 62 / 245	11.6
Sum, rounded to a whole point						31

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,113	2470.2	− 2432	38.2	× 52 / 240	8.3
4	59,114	2492.9	− 2473	19.9	× 58 / 240	4.8
5	59,115	2508.8	− 2502	6.8	× 69 / 240	2
6	59,116	2587.7	− 2531	56.7	× 61 / 240	14.4
Sum, rounded to a whole point						29

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −22, −12, −10, −10, 11, 39, 31, 31, 29 → 9.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 10 · 2016→2017: 2 · 2017→2018: 0 · 2018→2019: 21 · 2019→2022: 28 · 2022→2023: 8 · 2023→2024: 0 · 2024→2025: 2 → average 8.9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8.9 × 2.66 = 23.7. Upper limit 33.4, lower limit −14.

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.