Vernon City 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	32,531	2412.9	− 2432	−19.1	× 38 / 124	−5.9
4	32,533	2405.2	− 2473	−67.8	× 37 / 124	−20.2
5	32,535	2473.5	− 2502	−28.5	× 49 / 124	−11.3
Sum, rounded to a whole point						−37

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	30,743	2383.4	− 2432	−48.6	× 23 / 139	−8
4	30,745	2432.2	− 2473	−40.8	× 35 / 139	−10.3
5	30,747	2477.4	− 2502	−24.6	× 38 / 139	−6.7
6	30,750	2499.6	− 2531	−31.4	× 43 / 139	−9.7
Sum, rounded to a whole point						−35

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	31,309	2412.8	− 2432	−19.2	× 48 / 141	−6.5
4	31,311	2422.3	− 2473	−50.7	× 22 / 141	−7.9
5	31,313	2497.3	− 2502	−4.7	× 40 / 141	−1.3
6	31,314	2496.9	− 2531	−34.1	× 31 / 141	−7.5
Sum, rounded to a whole point						−23

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	31,356	2426.0	− 2432	−6	× 28 / 119	−1.4
4	31,357	2446.4	− 2473	−26.6	× 42 / 119	−9.4
5	31,359	2460.4	− 2502	−41.6	× 21 / 119	−7.3
6	31,362	2540.1	− 2531	9.1	× 28 / 119	2.1
Sum, rounded to a whole point						−16

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	31,527	2453.9	− 2432	21.9	× 28 / 96	6.4
4	31,528	2424.8	− 2473	−48.2	× 27 / 96	−13.6
5	31,529	2504.9	− 2502	2.9	× 41 / 96	1.2
Sum, rounded to a whole point						−6

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	31,544	2503.1	− 2432	71.1	× 17 / 100	12.1
4	31,545	2466.5	− 2473	−6.5	× 24 / 100	−1.6
5	31,546	2482.6	− 2502	−19.4	× 37 / 100	−7.2
6	31,547	2504.9	− 2531	−26.1	× 22 / 100	−5.7
Sum, rounded to a whole point						−2

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	31,601	2421.2	− 2432	−10.8	× 25 / 88	−3.1
4	31,602	2468.6	− 2473	−4.4	× 18 / 88	−0.9
5	31,603	2483.2	− 2502	−18.8	× 20 / 88	−4.3
6	31,604	2497.3	− 2531	−33.7	× 25 / 88	−9.6
Sum, rounded to a whole point						−18

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	31,467	2440.8	− 2432	8.8	× 17 / 69	2.2
4	31,468	2453.7	− 2473	−19.3	× 24 / 69	−6.7
5	31,469	2551.0	− 2502	49	× 15 / 69	10.7
6	31,470	2556.6	− 2531	25.6	× 13 / 69	4.8
Sum, rounded to a whole point						11

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	31,326	2509.3	− 2432	77.3	× 20 / 77	20.1
4	31,327	2473.5	− 2473	0.5	× 17 / 77	0.1
5	31,328	2513.7	− 2502	11.7	× 26 / 77	4
6	31,329	2588.4	− 2531	57.4	× 14 / 77	10.4
Sum, rounded to a whole point						35

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −37, −35, −23, −16, −6, −2, −18, 11, 35 → −10.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 2 · 2016→2017: 12 · 2017→2018: 7 · 2018→2019: 10 · 2019→2022: 4 · 2022→2023: 16 · 2023→2024: 29 · 2024→2025: 24 → average 13
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 13 × 2.66 = 34.6. Upper limit 24.5, lower limit −44.7.

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.