Virginia R. Boris 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.

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,174	2451.0	− 2432	19	× 81 / 289	5.3
4	9,176	2534.0	− 2473	61	× 72 / 289	15.2
5	9,179	2544.9	− 2502	42.9	× 99 / 289	14.7
6	9,180	2533.1	− 2531	2.1	× 37 / 289	0.3
Sum, rounded to a whole point						35

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,197	2454.7	− 2432	22.7	× 82 / 361	5.2
4	9,198	2495.4	− 2473	22.4	× 94 / 361	5.8
5	9,201	2535.6	− 2502	33.6	× 77 / 361	7.2
6	9,202	2578.8	− 2531	47.8	× 108 / 361	14.3
Sum, rounded to a whole point						32

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,266	2473.1	− 2432	41.1	× 101 / 356	11.7
4	9,267	2504.1	− 2473	31.1	× 94 / 356	8.2
5	9,268	2548.2	− 2502	46.2	× 86 / 356	11.2
6	9,269	2591.7	− 2531	60.7	× 75 / 356	12.8
Sum, rounded to a whole point						44

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,223	2398.4	− 2432	−33.6	× 83 / 358	−7.8
4	9,224	2473.2	− 2473	0.2	× 97 / 358	0.1
5	9,225	2494.5	− 2502	−7.5	× 84 / 358	−1.8
6	9,226	2555.7	− 2531	24.7	× 94 / 358	6.5
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	9,205	2430.9	− 2432	−1.1	× 120 / 435	−0.3
4	9,206	2454.6	− 2473	−18.4	× 107 / 435	−4.5
5	9,207	2502.1	− 2502	0.1	× 109 / 435	0
6	9,208	2538.5	− 2531	7.5	× 99 / 435	1.7
Sum, rounded to a whole point						−3

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,155	2393.6	− 2432	−38.4	× 98 / 472	−8
4	9,156	2439.4	− 2473	−33.6	× 136 / 472	−9.7
5	9,157	2499.0	− 2502	−3	× 116 / 472	−0.7
6	9,158	2531.7	− 2531	0.7	× 122 / 472	0.2
Sum, rounded to a whole point						−18

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,124	2428.9	− 2432	−3.1	× 88 / 375	−0.7
4	9,125	2473.1	− 2473	0.1	× 80 / 375	0
5	9,126	2498.5	− 2502	−3.5	× 106 / 375	−1
6	9,127	2549.2	− 2531	18.2	× 101 / 375	4.9
Sum, rounded to a whole point						3

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 35, 32, 44, −3, −3, −18, 3 → 12.9
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2017→2018: 3 · 2018→2019: 12 · 2019→2022: 47 · 2022→2023: 0 · 2023→2024: 15 · 2024→2025: 21 → average 16.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 16.3 × 2.66 = 43.4. Upper limit 56.3, lower limit −30.5.

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 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.