Shannon 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	7,854	2387.4	− 2432	−44.6	× 40 / 157	−11.4
4	7,856	2412.3	− 2473	−60.7	× 41 / 157	−15.9
5	7,858	2458.2	− 2502	−43.8	× 36 / 157	−10
6	7,860	2479.5	− 2531	−51.5	× 40 / 157	−13.1
Sum, rounded to a whole point						−50

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	7,038	2409.3	− 2432	−22.7	× 38 / 157	−5.5
4	7,041	2460.7	− 2473	−12.3	× 41 / 157	−3.2
5	7,042	2484.3	− 2502	−17.7	× 45 / 157	−5.1
6	7,044	2521.6	− 2531	−9.4	× 33 / 157	−2
Sum, rounded to a whole point						−16

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	7,250	2388.9	− 2432	−43.1	× 47 / 154	−13.2
4	7,253	2447.4	− 2473	−25.6	× 27 / 154	−4.5
5	7,255	2480.0	− 2502	−22	× 36 / 154	−5.1
6	7,257	2525.1	− 2531	−5.9	× 44 / 154	−1.7
Sum, rounded to a whole point						−24

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	7,269	2415.6	− 2432	−16.4	× 42 / 153	−4.5
4	7,271	2427.6	− 2473	−45.4	× 51 / 153	−15.1
5	7,273	2483.8	− 2502	−18.2	× 28 / 153	−3.3
6	7,275	2548.5	− 2531	17.5	× 32 / 153	3.7
Sum, rounded to a whole point						−19

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	7,314	2367.4	− 2432	−64.6	× 48 / 166	−18.7
4	7,315	2446.1	− 2473	−26.9	× 43 / 166	−7
5	7,316	2447.0	− 2502	−55	× 47 / 166	−15.6
6	7,317	2520.9	− 2531	−10.1	× 28 / 166	−1.7
Sum, rounded to a whole point						−43

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	7,259	2400.4	− 2432	−31.6	× 43 / 176	−7.7
4	7,260	2423.0	− 2473	−50	× 38 / 176	−10.8
5	7,261	2453.3	− 2502	−48.7	× 44 / 176	−12.2
6	7,262	2480.4	− 2531	−50.6	× 51 / 176	−14.7
Sum, rounded to a whole point						−45

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	7,247	2379.6	− 2432	−52.4	× 42 / 160	−13.8
4	7,248	2435.0	− 2473	−38	× 41 / 160	−9.7
5	7,249	2491.4	− 2502	−10.6	× 32 / 160	−2.1
6	7,250	2503.7	− 2531	−27.3	× 45 / 160	−7.7
Sum, rounded to a whole point						−33

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	7,194	2411.6	− 2432	−20.4	× 42 / 155	−5.5
4	7,195	2429.3	− 2473	−43.7	× 42 / 155	−11.8
5	7,196	2460.5	− 2502	−41.5	× 43 / 155	−11.5
6	7,197	2546.4	− 2531	15.4	× 28 / 155	2.8
Sum, rounded to a whole point						−26

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	7,154	2361.9	− 2432	−70.1	× 42 / 177	−16.6
4	7,155	2431.7	− 2473	−41.3	× 45 / 177	−10.5
5	7,156	2462.2	− 2502	−39.8	× 44 / 177	−9.9
6	7,157	2505.9	− 2531	−25.1	× 46 / 177	−6.5
Sum, rounded to a whole point						−44

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −50, −16, −24, −19, −43, −45, −33, −26, −44 → −33.3
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 34 · 2016→2017: 8 · 2017→2018: 5 · 2018→2019: 24 · 2019→2022: 2 · 2022→2023: 12 · 2023→2024: 7 · 2024→2025: 18 → average 13.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 13.8 × 2.66 = 36.7. Upper limit 3.4, lower limit −70.

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.