Venetia Valley K-8: 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	42,534	2414.1	− 2436	−21.9	× 85 / 449	−4.1
4	42,535	2453.5	− 2485	−31.5	× 83 / 449	−5.8
5	42,538	2472.8	− 2528	−55.2	× 76 / 449	−9.3
6	42,539	2465.6	− 2552	−86.4	× 87 / 449	−16.7
7	42,542	2475.4	− 2567	−91.6	× 61 / 449	−12.4
8	42,543	2561.8	− 2586	−24.2	× 57 / 449	−3.1
Sum, rounded to a whole point						−52

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,294	2427.5	− 2436	−8.5	× 84 / 471	−1.5
4	39,296	2464.7	− 2485	−20.3	× 87 / 471	−3.7
5	39,297	2514.9	− 2528	−13.1	× 81 / 471	−2.3
6	39,300	2478.3	− 2552	−73.7	× 75 / 471	−11.7
7	39,302	2505.9	− 2567	−61.1	× 84 / 471	−10.9
8	39,303	2485.5	− 2586	−100.5	× 60 / 471	−12.8
Sum, rounded to a whole point						−43

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,303	2451.3	− 2436	15.3	× 64 / 451	2.2
4	40,305	2472.2	− 2485	−12.8	× 84 / 451	−2.4
5	40,307	2504.4	− 2528	−23.6	× 84 / 451	−4.4
6	40,308	2489.9	− 2552	−62.1	× 73 / 451	−10.1
7	40,311	2511.3	− 2567	−55.7	× 70 / 451	−8.6
8	40,313	2534.6	− 2586	−51.4	× 76 / 451	−8.7
Sum, rounded to a whole point						−32

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,319	2404.4	− 2436	−31.6	× 74 / 440	−5.3
4	40,322	2498.7	− 2485	13.7	× 66 / 440	2.1
5	40,323	2488.5	− 2528	−39.5	× 83 / 440	−7.5
6	40,326	2507.9	− 2552	−44.1	× 77 / 440	−7.7
7	40,327	2496.1	− 2567	−70.9	× 71 / 440	−11.4
8	40,330	2515.1	− 2586	−70.9	× 69 / 440	−11.1
Sum, rounded to a whole point						−41

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,472	2398.7	− 2436	−37.3	× 69 / 420	−6.1
4	40,473	2451.0	− 2485	−34	× 74 / 420	−6
5	40,474	2501.1	− 2528	−26.9	× 60 / 420	−3.8
6	40,475	2478.9	− 2552	−73.1	× 78 / 420	−13.6
7	40,476	2526.7	− 2567	−40.3	× 72 / 420	−6.9
8	40,477	2520.4	− 2586	−65.6	× 67 / 420	−10.5
Sum, rounded to a whole point						−47

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,403	2387.4	− 2436	−48.6	× 57 / 400	−6.9
4	39,404	2447.0	− 2485	−38	× 56 / 400	−5.3
5	39,405	2453.6	− 2528	−74.4	× 61 / 400	−11.3
6	39,406	2457.4	− 2552	−94.6	× 80 / 400	−18.9
7	39,407	2502.4	− 2567	−64.6	× 67 / 400	−10.8
8	39,408	2492.3	− 2586	−93.7	× 79 / 400	−18.5
Sum, rounded to a whole point						−72

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,241	2406.1	− 2436	−29.9	× 59 / 413	−4.3
4	40,242	2445.8	− 2485	−39.2	× 69 / 413	−6.5
5	40,243	2462.6	− 2528	−65.4	× 64 / 413	−10.1
6	40,244	2457.7	− 2552	−94.3	× 76 / 413	−17.4
7	40,245	2469.2	− 2567	−97.8	× 76 / 413	−18
8	40,246	2499.3	− 2586	−86.7	× 69 / 413	−14.5
Sum, rounded to a whole point						−71

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,290	2392.6	− 2436	−43.4	× 67 / 443	−6.6
4	40,291	2449.0	− 2485	−36	× 71 / 443	−5.8
5	40,292	2462.0	− 2528	−66	× 75 / 443	−11.2
6	40,293	2420.0	− 2552	−132	× 78 / 443	−23.2
7	40,294	2436.5	− 2567	−130.5	× 78 / 443	−23
8	40,295	2499.1	− 2586	−86.9	× 74 / 443	−14.5
Sum, rounded to a whole point						−84

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,109	2366.9	− 2436	−69.1	× 71 / 464	−10.6
4	40,110	2436.3	− 2485	−48.7	× 77 / 464	−8.1
5	40,111	2474.7	− 2528	−53.3	× 78 / 464	−9
6	40,112	2441.7	− 2552	−110.3	× 84 / 464	−20
7	40,113	2432.8	− 2567	−134.2	× 79 / 464	−22.8
8	40,114	2503.9	− 2586	−82.1	× 75 / 464	−13.3
Sum, rounded to a whole point						−84

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,888	2372.0	− 2436	−64	× 75 / 452	−10.6
4	39,889	2422.7	− 2485	−62.3	× 70 / 452	−9.6
5	39,890	2473.8	− 2528	−54.2	× 77 / 452	−9.2
6	39,891	2467.2	− 2552	−84.8	× 77 / 452	−14.4
7	39,892	2460.4	− 2567	−106.6	× 79 / 452	−18.6
8	39,893	2531.1	− 2586	−54.9	× 74 / 452	−9
Sum, rounded to a whole point						−72

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −52, −43, −32, −41, −47, −72, −71, −84, −84, −72 → −59.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 9 · 2016→2017: 11 · 2017→2018: 9 · 2018→2019: 6 · 2019→2021: 25 · 2021→2022: 1 · 2022→2023: 13 · 2023→2024: 0 · 2024→2025: 12 → average 9.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.6 × 2.66 = 25.5. Upper limit −34.3, lower limit −85.3.

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.