Geyserville Unified: math

The shaded band is this district'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	94,203	2472.4	− 2436	36.4	× 19 / 128	5.4
4	94,204	2444.7	− 2485	−40.3	× 24 / 128	−7.6
5	94,207	2499.5	− 2528	−28.5	× 14 / 128	−3.1
6	94,208	2468.1	− 2552	−83.9	× 19 / 128	−12.5
7	94,211	2425.9	− 2567	−141.1	× 16 / 128	−17.6
8	94,212	2505.1	− 2586	−80.9	× 14 / 128	−8.8
11	94,215	2533.2	− 2628	−94.8	× 22 / 128	−16.3
Sum, rounded to a whole point						−61

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,457	2461.7	− 2436	25.7	× 23 / 131	4.5
4	87,460	2502.4	− 2485	17.4	× 17 / 131	2.3
5	87,461	2432.0	− 2528	−96	× 23 / 131	−16.9
6	87,464	2487.5	− 2552	−64.5	× 17 / 131	−8.4
7	87,466	2457.2	− 2567	−109.8	× 22 / 131	−18.4
8	87,467	2405.1	− 2586	−180.9	× 12 / 131	−16.6
11	87,470	2491.1	− 2628	−136.9	× 17 / 131	−17.8
Sum, rounded to a whole point						−71

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,955	2451.2	− 2436	15.2	× 17 / 132	2
4	89,956	2484.1	− 2485	−0.9	× 19 / 132	−0.1
5	89,959	2511.1	− 2528	−16.9	× 21 / 132	−2.7
6	89,961	2442.1	− 2552	−109.9	× 19 / 132	−15.8
7	89,963	2508.2	− 2567	−58.8	× 18 / 132	−8
8	89,964	2439.9	− 2586	−146.1	× 19 / 132	−21
11	89,966	2526.7	− 2628	−101.3	× 19 / 132	−14.6
Sum, rounded to a whole point						−60

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,152	2491.2	− 2436	55.2	× 19 / 129	8.1
4	90,153	2468.5	− 2485	−16.5	× 17 / 129	−2.2
5	90,156	2472.2	− 2528	−55.8	× 19 / 129	−8.2
6	90,157	2548.2	− 2552	−3.8	× 17 / 129	−0.5
7	90,160	2429.5	− 2567	−137.5	× 22 / 129	−23.4
8	90,161	2497.9	− 2586	−88.1	× 22 / 129	−15
11	90,164	2462.4	− 2628	−165.6	× 13 / 129	−16.7
Sum, rounded to a whole point						−58

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,765	2470.7	− 2436	34.7	× 18 / 123	5.1
4	90,766	2483.6	− 2485	−1.4	× 19 / 123	−0.2
5	90,767	2460.4	− 2528	−67.6	× 18 / 123	−9.9
6	90,768	2472.4	− 2552	−79.6	× 16 / 123	−10.4
7	90,769	2550.5	− 2567	−16.5	× 19 / 123	−2.5
8	90,770	2456.7	− 2586	−129.3	× 19 / 123	−20
11	90,771	2437.3	− 2628	−190.7	× 14 / 123	−21.7
Sum, rounded to a whole point						−60

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	88,878	2440.5	− 2552	−111.5	× 15 / 64	−26.1
7	88,879	2430.6	− 2567	−136.4	× 16 / 64	−34.1
8	88,880	2454.9	− 2586	−131.1	× 19 / 64	−38.9
11	88,881	2488.3	− 2628	−139.7	× 14 / 64	−30.6
Sum, rounded to a whole point						−130

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,007	2450.3	− 2436	14.3	× 13 / 98	1.9
4	91,008	2440.8	− 2485	−44.2	× 11 / 98	−5
5	91,009	2482.3	− 2528	−45.7	× 13 / 98	−6.1
6	91,010	2452.2	− 2552	−99.8	× 12 / 98	−12.2
7	91,011	2449.7	− 2567	−117.3	× 15 / 98	−18
8	91,012	2436.5	− 2586	−149.5	× 14 / 98	−21.4
11	91,013	2471.0	− 2628	−157	× 20 / 98	−32
Sum, rounded to a whole point						−93

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,901	2448.0	− 2436	12	× 17 / 97	2.1
4	90,902	2490.8	− 2485	5.8	× 13 / 97	0.8
5	90,903	2418.1	− 2528	−109.9	× 14 / 97	−15.9
6	90,904	2514.5	− 2552	−37.5	× 12 / 97	−4.6
7	90,905	2455.5	− 2567	−111.5	× 14 / 97	−16.1
8	90,906	2435.6	− 2586	−150.4	× 15 / 97	−23.3
11	90,907	2569.2	− 2628	−58.8	× 12 / 97	−7.3
Sum, rounded to a whole point						−64

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,846	2452.5	− 2436	16.5	× 18 / 112	2.7
4	90,847	2446.6	− 2485	−38.4	× 19 / 112	−6.5
5	90,848	2469.1	− 2528	−58.9	× 15 / 112	−7.9
6	90,849	2413.1	− 2552	−138.9	× 13 / 112	−16.1
7	90,850	2521.1	− 2567	−45.9	× 14 / 112	−5.7
8	90,851	2443.8	− 2586	−142.2	× 15 / 112	−19
11	90,852	2510.5	− 2628	−117.5	× 18 / 112	−18.9
Sum, rounded to a whole point						−72

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,536	2443.7	− 2436	7.7	× 18 / 108	1.3
4	90,537	2392.9	− 2485	−92.1	× 15 / 108	−12.8
5	90,538	2409.2	− 2528	−118.8	× 19 / 108	−20.9
6	90,539	2501.4	− 2552	−50.6	× 14 / 108	−6.6
7	90,540	2414.4	− 2567	−152.6	× 13 / 108	−18.4
8	90,541	2499.9	− 2586	−86.1	× 15 / 108	−12
11	90,542	2468.1	− 2628	−159.9	× 14 / 108	−20.7
Sum, rounded to a whole point						−90

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	90,196	2447.4	− 2485	−37.6	× 16 / 93	−6.5
5	90,197	2470.4	− 2528	−57.6	× 15 / 93	−9.3
6	90,198	2431.7	− 2552	−120.3	× 18 / 93	−23.3
7	90,199	2478.8	− 2567	−88.2	× 16 / 93	−15.2
8	90,200	2422.3	− 2586	−163.7	× 13 / 93	−22.9
11	90,201	2483.2	− 2628	−144.8	× 15 / 93	−23.4
Sum, rounded to a whole point						−100

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −61, −71, −60, −58, −60, −130, −93, −64, −72, −90, −100 → −78.1
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: 11 · 2017→2018: 2 · 2018→2019: 2 · 2019→2021: 70 · 2021→2022: 37 · 2022→2023: 29 · 2023→2024: 8 · 2024→2025: 18 · 2025→2026: 10 → average 19.7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 19.7 × 2.66 = 52.4. Upper limit −25.7, lower limit −130.5.

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 — for a district, the total across its schools. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.

Geyserville Unified