Glen H. Dysinger Sr. 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	49,019	2430.7	− 2436	−5.3	× 85 / 324	−1.4
4	49,020	2442.2	− 2485	−42.8	× 80 / 324	−10.6
5	49,023	2512.0	− 2528	−16	× 80 / 324	−4
6	49,024	2523.9	− 2552	−28.1	× 79 / 324	−6.9
Sum, rounded to a whole point						−23

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,568	2436.1	− 2436	0.1	× 72 / 304	0
4	45,570	2497.5	− 2485	12.5	× 79 / 304	3.2
5	45,572	2496.2	− 2528	−31.8	× 75 / 304	−7.8
6	45,573	2518.9	− 2552	−33.1	× 78 / 304	−8.5
Sum, rounded to a whole point						−13

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,782	2452.9	− 2436	16.9	× 78 / 286	4.6
4	46,784	2499.3	− 2485	14.3	× 63 / 286	3.2
5	46,786	2523.5	− 2528	−4.5	× 74 / 286	−1.2
6	46,788	2504.1	− 2552	−47.9	× 71 / 286	−11.9
Sum, rounded to a whole point						−5

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,791	2457.1	− 2436	21.1	× 60 / 259	4.9
4	46,793	2504.9	− 2485	19.9	× 69 / 259	5.3
5	46,795	2523.7	− 2528	−4.3	× 58 / 259	−1
6	46,797	2569.1	− 2552	17.1	× 72 / 259	4.8
Sum, rounded to a whole point						14

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,971	2461.4	− 2436	25.4	× 67 / 247	6.9
4	46,972	2508.0	− 2485	23	× 56 / 247	5.2
5	46,973	2528.4	− 2528	0.4	× 66 / 247	0.1
6	46,974	2568.0	− 2552	16	× 58 / 247	3.8
Sum, rounded to a whole point						16

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,809	2425.5	− 2436	−10.5	× 65 / 272	−2.5
4	46,810	2498.0	− 2485	13	× 60 / 272	2.9
5	46,811	2464.4	− 2528	−63.6	× 73 / 272	−17.1
6	46,812	2527.1	− 2552	−24.9	× 74 / 272	−6.8
Sum, rounded to a whole point						−23

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,797	2428.5	− 2436	−7.5	× 78 / 276	−2.1
4	46,798	2467.7	− 2485	−17.3	× 68 / 276	−4.3
5	46,799	2512.0	− 2528	−16	× 60 / 276	−3.5
6	46,800	2502.1	− 2552	−49.9	× 70 / 276	−12.7
Sum, rounded to a whole point						−23

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,652	2433.4	− 2436	−2.6	× 61 / 273	−0.6
4	46,653	2463.4	− 2485	−21.6	× 83 / 273	−6.6
5	46,654	2492.5	− 2528	−35.5	× 67 / 273	−8.7
6	46,655	2535.8	− 2552	−16.2	× 62 / 273	−3.7
Sum, rounded to a whole point						−20

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,410	2420.6	− 2436	−15.4	× 76 / 270	−4.3
4	46,411	2464.7	− 2485	−20.3	× 54 / 270	−4.1
5	46,412	2472.9	− 2528	−55.1	× 74 / 270	−15.1
6	46,413	2515.9	− 2552	−36.1	× 66 / 270	−8.8
Sum, rounded to a whole point						−32

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −23, −13, −5, 14, 16, −23, −23, −20, −32 → −12.1
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: 8 · 2017→2018: 19 · 2018→2019: 2 · 2019→2022: 39 · 2022→2023: 0 · 2023→2024: 3 · 2024→2025: 12 → average 11.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 11.6 × 2.66 = 30.9. Upper limit 18.8, lower limit −43.

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.