Wishon 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	10,963	2393.2	− 2436	−42.8	× 95 / 345	−11.8
4	10,964	2419.2	− 2485	−65.8	× 76 / 345	−14.5
5	10,967	2421.1	− 2528	−106.9	× 82 / 345	−25.4
6	10,968	2477.9	− 2552	−74.1	× 92 / 345	−19.8
Sum, rounded to a whole point						−71

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,981	2419.5	− 2436	−16.5	× 80 / 324	−4.1
4	9,982	2445.1	− 2485	−39.9	× 87 / 324	−10.7
5	9,985	2450.5	− 2528	−77.5	× 79 / 324	−18.9
6	9,986	2462.4	− 2552	−89.6	× 78 / 324	−21.6
Sum, rounded to a whole point						−55

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,309	2399.5	− 2436	−36.5	× 84 / 327	−9.4
4	10,310	2445.9	− 2485	−39.1	× 77 / 327	−9.2
5	10,312	2479.2	− 2528	−48.8	× 89 / 327	−13.3
6	10,315	2492.4	− 2552	−59.6	× 77 / 327	−14
Sum, rounded to a whole point						−46

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,326	2454.6	− 2436	18.6	× 71 / 311	4.2
4	10,329	2468.5	− 2485	−16.5	× 78 / 311	−4.1
5	10,330	2489.2	− 2528	−38.8	× 72 / 311	−9
6	10,333	2508.9	− 2552	−43.1	× 90 / 311	−12.5
Sum, rounded to a whole point						−21

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,407	2441.7	− 2436	5.7	× 73 / 307	1.4
4	10,408	2462.1	− 2485	−22.9	× 77 / 307	−5.7
5	10,409	2495.8	− 2528	−32.2	× 75 / 307	−7.9
6	10,410	2507.9	− 2552	−44.1	× 82 / 307	−11.8
Sum, rounded to a whole point						−24

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,400	2385.4	− 2436	−50.6	× 77 / 240	−16.2
4	10,401	2449.0	− 2485	−36	× 47 / 240	−7.1
5	10,402	2471.3	− 2528	−56.7	× 66 / 240	−15.6
6	10,403	2478.0	− 2552	−74	× 50 / 240	−15.4
Sum, rounded to a whole point						−54

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,388	2425.8	− 2436	−10.2	× 69 / 270	−2.6
4	10,389	2429.2	− 2485	−55.8	× 76 / 270	−15.7
5	10,390	2452.7	− 2528	−75.3	× 52 / 270	−14.5
6	10,391	2469.5	− 2552	−82.5	× 73 / 270	−22.3
Sum, rounded to a whole point						−55

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,354	2408.0	− 2436	−28	× 80 / 280	−8
4	10,355	2439.8	− 2485	−45.2	× 66 / 280	−10.7
5	10,356	2429.9	− 2528	−98.1	× 77 / 280	−27
6	10,357	2494.7	− 2552	−57.3	× 57 / 280	−11.7
Sum, rounded to a whole point						−57

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,331	2406.5	− 2436	−29.5	× 60 / 272	−6.5
4	10,332	2436.3	− 2485	−48.7	× 79 / 272	−14.1
5	10,333	2435.5	− 2528	−92.5	× 59 / 272	−20.1
6	10,334	2455.9	− 2552	−96.1	× 74 / 272	−26.1
Sum, rounded to a whole point						−67

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −71, −55, −46, −21, −24, −54, −55, −57, −67 → −50
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: 9 · 2017→2018: 25 · 2018→2019: 3 · 2019→2022: 30 · 2022→2023: 1 · 2023→2024: 2 · 2024→2025: 10 → average 12
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 12 × 2.66 = 31.9. Upper limit −18.1, lower limit −81.9.

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.