Chawanakee 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	41,607	2409.6	− 2436	−26.4	× 62 / 381	−4.3
4	41,610	2457.1	− 2485	−27.9	× 47 / 381	−3.4
5	41,611	2463.9	− 2528	−64.1	× 56 / 381	−9.4
6	41,614	2464.9	− 2552	−87.1	× 53 / 381	−12.1
7	41,615	2495.7	− 2567	−71.3	× 61 / 381	−11.4
8	41,617	2484.1	− 2586	−101.9	× 46 / 381	−12.3
11	41,620	2475.1	− 2628	−152.9	× 56 / 381	−22.5
Sum, rounded to a whole point						−75

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	38,504	2408.9	− 2436	−27.1	× 56 / 417	−3.6
4	38,505	2425.6	− 2485	−59.4	× 62 / 417	−8.8
5	38,508	2463.8	− 2528	−64.2	× 44 / 417	−6.8
6	38,509	2462.1	− 2552	−89.9	× 58 / 417	−12.5
7	38,511	2516.4	− 2567	−50.6	× 62 / 417	−7.5
8	38,513	2532.1	− 2586	−53.9	× 56 / 417	−7.2
11	38,515	2572.7	− 2628	−55.3	× 79 / 417	−10.5
Sum, rounded to a whole point						−57

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,433	2413.7	− 2436	−22.3	× 50 / 423	−2.6
4	39,434	2454.8	− 2485	−30.2	× 56 / 423	−4
5	39,437	2461.0	− 2528	−67	× 62 / 423	−9.8
6	39,439	2490.6	− 2552	−61.4	× 45 / 423	−6.5
7	39,441	2515.2	− 2567	−51.8	× 52 / 423	−6.4
8	39,442	2531.7	− 2586	−54.3	× 55 / 423	−7.1
11	39,445	2527.0	− 2628	−101	× 103 / 423	−24.6
Sum, rounded to a whole point						−61

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,466	2368.8	− 2436	−67.2	× 54 / 467	−7.8
4	39,467	2462.2	− 2485	−22.8	× 57 / 467	−2.8
5	39,470	2456.9	− 2528	−71.1	× 58 / 467	−8.8
6	39,471	2484.7	− 2552	−67.3	× 64 / 467	−9.2
7	39,474	2532.7	− 2567	−34.3	× 55 / 467	−4
8	39,475	2533.6	− 2586	−52.4	× 53 / 467	−5.9
11	39,478	2546.6	− 2628	−81.4	× 126 / 467	−22
Sum, rounded to a whole point						−61

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,607	2390.8	− 2436	−45.2	× 65 / 596	−4.9
4	39,608	2425.0	− 2485	−60	× 82 / 596	−8.3
5	39,609	2455.0	− 2528	−73	× 75 / 596	−9.2
6	39,610	2477.2	− 2552	−74.8	× 73 / 596	−9.2
7	39,611	2536.1	− 2567	−30.9	× 99 / 596	−5.1
8	39,612	2553.2	− 2586	−32.8	× 71 / 596	−3.9
11	39,613	2543.8	− 2628	−84.2	× 131 / 596	−18.5
Sum, rounded to a whole point						−59

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	38,598	2534.2	− 2628	−93.8	× 128 / 128	−93.8
Sum, rounded to a whole point						−94

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,398	2408.9	− 2436	−27.1	× 85 / 686	−3.4
4	39,399	2440.8	− 2485	−44.2	× 95 / 686	−6.1
5	39,400	2436.8	− 2528	−91.2	× 101 / 686	−13.4
6	39,401	2502.4	− 2552	−49.6	× 101 / 686	−7.3
7	39,402	2497.5	− 2567	−69.5	× 98 / 686	−9.9
8	39,403	2512.3	− 2586	−73.7	× 89 / 686	−9.6
11	39,404	2528.2	− 2628	−99.8	× 117 / 686	−17
Sum, rounded to a whole point						−67

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,455	2410.2	− 2436	−25.8	× 106 / 675	−4.1
4	39,456	2432.0	− 2485	−53	× 81 / 675	−6.4
5	39,457	2455.6	− 2528	−72.4	× 88 / 675	−9.4
6	39,458	2475.3	− 2552	−76.7	× 99 / 675	−11.2
7	39,459	2510.7	− 2567	−56.3	× 90 / 675	−7.5
8	39,460	2486.0	− 2586	−100	× 90 / 675	−13.3
11	39,461	2532.2	− 2628	−95.8	× 121 / 675	−17.2
Sum, rounded to a whole point						−69

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,274	2395.1	− 2436	−40.9	× 87 / 647	−5.5
4	39,275	2455.2	− 2485	−29.8	× 88 / 647	−4.1
5	39,276	2469.6	− 2528	−58.4	× 84 / 647	−7.6
6	39,277	2481.7	− 2552	−70.3	× 81 / 647	−8.8
7	39,278	2491.1	− 2567	−75.9	× 97 / 647	−11.4
8	39,279	2500.9	− 2586	−85.1	× 100 / 647	−13.2
11	39,280	2554.3	− 2628	−73.7	× 110 / 647	−12.5
Sum, rounded to a whole point						−63

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,043	2401.8	− 2436	−34.2	× 98 / 687	−4.9
4	39,044	2449.8	− 2485	−35.2	× 91 / 687	−4.7
5	39,045	2462.5	− 2528	−65.5	× 90 / 687	−8.6
6	39,046	2490.9	− 2552	−61.1	× 104 / 687	−9.2
7	39,047	2513.6	− 2567	−53.4	× 82 / 687	−6.4
8	39,048	2516.7	− 2586	−69.3	× 97 / 687	−9.8
11	39,049	2538.6	− 2628	−89.4	× 125 / 687	−16.3
Sum, rounded to a whole point						−60

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	38,981	2411.7	− 2436	−24.3	× 87 / 659	−3.2
4	38,982	2439.8	− 2485	−45.2	× 105 / 659	−7.2
5	38,983	2460.7	− 2528	−67.3	× 91 / 659	−9.3
6	38,984	2476.2	− 2552	−75.8	× 82 / 659	−9.4
7	38,985	2530.7	− 2567	−36.3	× 89 / 659	−4.9
8	38,986	2540.9	− 2586	−45.1	× 86 / 659	−5.9
11	38,987	2532.7	− 2628	−95.3	× 119 / 659	−17.2
Sum, rounded to a whole point						−57

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −75, −57, −61, −61, −59, −94, −67, −69, −63, −60, −57 → −65.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 18 · 2016→2017: 4 · 2017→2018: 0 · 2018→2019: 2 · 2019→2021: 35 · 2021→2022: 27 · 2022→2023: 2 · 2023→2024: 6 · 2024→2025: 3 · 2025→2026: 3 → average 10
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10 × 2.66 = 26.6. Upper limit −39.1, lower limit −92.3.

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 — 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.

Chawanakee Unified