Laton Joint 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	11,533	2411.9	− 2436	−24.1	× 45 / 344	−3.2
4	11,535	2416.5	− 2485	−68.5	× 55 / 344	−11
5	11,536	2450.6	− 2528	−77.4	× 47 / 344	−10.6
6	11,539	2452.0	− 2552	−100	× 51 / 344	−14.8
7	11,540	2501.1	− 2567	−65.9	× 49 / 344	−9.4
8	11,542	2492.8	− 2586	−93.2	× 59 / 344	−16
11	11,545	2503.8	− 2628	−124.2	× 38 / 344	−13.7
Sum, rounded to a whole point						−79

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,543	2393.8	− 2436	−42.2	× 50 / 335	−6.3
4	10,545	2425.3	− 2485	−59.7	× 42 / 335	−7.5
5	10,546	2446.7	− 2528	−81.3	× 57 / 335	−13.8
6	10,548	2477.1	− 2552	−74.9	× 46 / 335	−10.3
7	10,551	2516.7	− 2567	−50.3	× 54 / 335	−8.1
8	10,552	2529.7	− 2586	−56.3	× 50 / 335	−8.4
11	10,555	2483.1	− 2628	−144.9	× 36 / 335	−15.6
Sum, rounded to a whole point						−70

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,874	2397.0	− 2436	−39	× 55 / 338	−6.3
4	10,876	2415.2	− 2485	−69.8	× 49 / 338	−10.1
5	10,878	2439.6	− 2528	−88.4	× 40 / 338	−10.5
6	10,880	2468.1	− 2552	−83.9	× 57 / 338	−14.1
7	10,883	2482.4	− 2567	−84.6	× 46 / 338	−11.5
8	10,884	2485.9	− 2586	−100.1	× 51 / 338	−15.1
11	10,886	2505.7	− 2628	−122.3	× 40 / 338	−14.5
Sum, rounded to a whole point						−82

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,880	2370.4	− 2436	−65.6	× 56 / 360	−10.2
4	10,883	2420.1	− 2485	−64.9	× 61 / 360	−11
5	10,884	2415.6	− 2528	−112.4	× 52 / 360	−16.2
6	10,887	2459.1	− 2552	−92.9	× 43 / 360	−11.1
7	10,888	2472.3	− 2567	−94.7	× 48 / 360	−12.6
8	10,891	2422.6	− 2586	−163.4	× 49 / 360	−22.2
11	10,892	2468.0	− 2628	−160	× 51 / 360	−22.7
Sum, rounded to a whole point						−106

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,962	2379.1	− 2436	−56.9	× 51 / 334	−8.7
4	10,963	2412.5	− 2485	−72.5	× 56 / 334	−12.2
5	10,964	2427.8	− 2528	−100.2	× 53 / 334	−15.9
6	10,965	2489.0	− 2552	−63	× 46 / 334	−8.7
7	10,966	2510.8	− 2567	−56.2	× 38 / 334	−6.4
8	10,967	2491.0	− 2586	−95	× 47 / 334	−13.4
11	10,968	2513.0	− 2628	−115	× 43 / 334	−14.8
Sum, rounded to a whole point						−80

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,818	2362.7	− 2436	−73.3	× 54 / 331	−12
4	10,819	2394.1	− 2485	−90.9	× 59 / 331	−16.2
5	10,820	2398.9	− 2528	−129.1	× 46 / 331	−17.9
6	10,821	2396.3	− 2552	−155.7	× 50 / 331	−23.5
7	10,822	2416.8	− 2567	−150.2	× 53 / 331	−24.1
8	10,823	2457.5	− 2586	−128.5	× 42 / 331	−16.3
11	10,824	2495.4	− 2628	−132.6	× 27 / 331	−10.8
Sum, rounded to a whole point						−121

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,977	2351.6	− 2436	−84.4	× 46 / 348	−11.2
4	10,978	2383.1	− 2485	−101.9	× 50 / 348	−14.6
5	10,979	2427.7	− 2528	−100.3	× 60 / 348	−17.3
6	10,980	2406.4	− 2552	−145.6	× 48 / 348	−20.1
7	10,981	2435.2	− 2567	−131.8	× 50 / 348	−18.9
8	10,982	2380.7	− 2586	−205.3	× 53 / 348	−31.3
11	10,983	2487.6	− 2628	−140.4	× 41 / 348	−16.5
Sum, rounded to a whole point						−130

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,959	2371.6	− 2436	−64.4	× 37 / 318	−7.5
4	10,960	2383.9	− 2485	−101.1	× 42 / 318	−13.4
5	10,961	2435.8	− 2528	−92.2	× 51 / 318	−14.8
6	10,962	2451.7	− 2552	−100.3	× 60 / 318	−18.9
7	10,963	2437.7	− 2567	−129.3	× 51 / 318	−20.7
8	10,964	2431.5	− 2586	−154.5	× 50 / 318	−24.3
11	10,965	2519.8	− 2628	−108.2	× 27 / 318	−9.2
Sum, rounded to a whole point						−109

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,919	2372.3	− 2436	−63.7	× 45 / 324	−8.8
4	10,920	2418.2	− 2485	−66.8	× 39 / 324	−8
5	10,921	2406.8	− 2528	−121.2	× 45 / 324	−16.8
6	10,922	2480.3	− 2552	−71.7	× 49 / 324	−10.8
7	10,923	2472.2	− 2567	−94.8	× 63 / 324	−18.4
8	10,924	2447.2	− 2586	−138.8	× 47 / 324	−20.1
11	10,925	2473.8	− 2628	−154.2	× 36 / 324	−17.1
Sum, rounded to a whole point						−100

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,892	2354.7	− 2436	−81.3	× 39 / 311	−10.2
4	10,893	2395.0	− 2485	−90	× 48 / 311	−13.9
5	10,894	2458.2	− 2528	−69.8	× 38 / 311	−8.5
6	10,895	2447.0	− 2552	−105	× 41 / 311	−13.8
7	10,896	2489.2	− 2567	−77.8	× 45 / 311	−11.3
8	10,897	2436.9	− 2586	−149.1	× 60 / 311	−28.8
11	10,898	2497.4	− 2628	−130.6	× 40 / 311	−16.8
Sum, rounded to a whole point						−103

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −79, −70, −82, −106, −80, −121, −130, −109, −100, −103 → −98
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: 12 · 2017→2018: 24 · 2018→2019: 26 · 2019→2021: 41 · 2021→2022: 9 · 2022→2023: 21 · 2023→2024: 9 · 2024→2025: 3 → average 17.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 17.1 × 2.66 = 45.5. Upper limit −52.5, lower limit −143.5.

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.