Mendocino 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	43,283	2421.2	− 2436	−14.8	× 37 / 257	−2.1
4	43,286	2431.0	− 2485	−54	× 41 / 257	−8.6
5	43,287	2487.9	− 2528	−40.1	× 34 / 257	−5.3
6	43,289	2498.0	− 2552	−54	× 30 / 257	−6.3
7	43,292	2559.9	− 2567	−7.1	× 32 / 257	−0.9
8	43,293	2624.5	− 2586	38.5	× 42 / 257	6.3
11	43,295	2608.6	− 2628	−19.4	× 41 / 257	−3.1
Sum, rounded to a whole point						−20

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,979	2453.2	− 2436	17.2	× 39 / 254	2.6
4	39,982	2458.9	− 2485	−26.1	× 42 / 254	−4.3
5	39,983	2458.8	− 2528	−69.2	× 39 / 254	−10.6
6	39,986	2505.1	− 2552	−46.9	× 36 / 254	−6.6
7	39,987	2624.9	− 2567	57.9	× 31 / 254	7.1
8	39,989	2618.1	− 2586	32.1	× 34 / 254	4.3
11	39,992	2569.5	− 2628	−58.5	× 33 / 254	−7.6
Sum, rounded to a whole point						−15

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,996	2422.6	− 2436	−13.4	× 31 / 269	−1.5
4	40,998	2487.2	− 2485	2.2	× 41 / 269	0.3
5	41,001	2500.8	− 2528	−27.2	× 43 / 269	−4.3
6	41,002	2489.9	− 2552	−62.1	× 38 / 269	−8.8
7	41,005	2586.9	− 2567	19.9	× 32 / 269	2.4
8	41,007	2654.2	− 2586	68.2	× 36 / 269	9.1
11	41,009	2601.8	− 2628	−26.2	× 48 / 269	−4.7
Sum, rounded to a whole point						−8

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,015	2466.6	− 2436	30.6	× 30 / 266	3.5
4	41,018	2476.0	− 2485	−9	× 32 / 266	−1.1
5	41,020	2526.7	− 2528	−1.3	× 44 / 266	−0.2
6	41,021	2500.6	− 2552	−51.4	× 47 / 266	−9.1
7	41,024	2568.0	− 2567	1	× 42 / 266	0.2
8	41,026	2612.3	− 2586	26.3	× 32 / 266	3.2
11	41,027	2548.4	− 2628	−79.6	× 39 / 266	−11.7
Sum, rounded to a whole point						−15

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,171	2443.7	− 2436	7.7	× 35 / 277	1
4	41,172	2463.0	− 2485	−22	× 33 / 277	−2.6
5	41,173	2510.3	− 2528	−17.7	× 31 / 277	−2
6	41,174	2508.9	− 2552	−43.1	× 50 / 277	−7.8
7	41,175	2523.4	− 2567	−43.6	× 42 / 277	−6.6
8	41,176	2587.3	− 2586	1.3	× 49 / 277	0.2
11	41,177	2582.9	− 2628	−45.1	× 37 / 277	−6
Sum, rounded to a whole point						−24

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,098	2393.8	− 2436	−42.2	× 22 / 166	−5.6
4	40,099	2444.0	− 2485	−41	× 21 / 166	−5.2
5	40,100	2456.4	− 2528	−71.6	× 34 / 166	−14.7
6	40,101	2476.5	− 2552	−75.5	× 24 / 166	−10.9
7	40,102	2509.9	− 2567	−57.1	× 16 / 166	−5.5
8	40,103	2524.4	− 2586	−61.6	× 24 / 166	−8.9
11	40,104	2589.0	− 2628	−39	× 25 / 166	−5.9
Sum, rounded to a whole point						−57

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,928	2422.2	− 2436	−13.8	× 31 / 203	−2.1
4	40,929	2478.9	− 2485	−6.1	× 28 / 203	−0.8
5	40,930	2475.8	− 2528	−52.2	× 28 / 203	−7.2
6	40,931	2495.4	− 2552	−56.6	× 37 / 203	−10.3
7	40,932	2549.6	− 2567	−17.4	× 24 / 203	−2.1
8	40,933	2615.8	− 2586	29.8	× 21 / 203	3.1
11	40,934	2580.6	− 2628	−47.4	× 34 / 203	−7.9
Sum, rounded to a whole point						−27

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,955	2426.7	− 2436	−9.3	× 20 / 198	−0.9
4	40,956	2441.1	− 2485	−43.9	× 28 / 198	−6.2
5	40,957	2500.1	− 2528	−27.9	× 29 / 198	−4.1
6	40,958	2514.2	− 2552	−37.8	× 25 / 198	−4.8
7	40,959	2514.7	− 2567	−52.3	× 39 / 198	−10.3
8	40,960	2559.0	− 2586	−27	× 29 / 198	−4
11	40,961	2573.5	− 2628	−54.5	× 28 / 198	−7.7
Sum, rounded to a whole point						−38

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,782	2412.4	− 2436	−23.6	× 29 / 225	−3
4	40,783	2458.8	− 2485	−26.2	× 20 / 225	−2.3
5	40,784	2508.6	− 2528	−19.4	× 30 / 225	−2.6
6	40,785	2537.8	− 2552	−14.2	× 33 / 225	−2.1
7	40,786	2546.8	− 2567	−20.2	× 29 / 225	−2.6
8	40,787	2547.9	− 2586	−38.1	× 41 / 225	−6.9
11	40,788	2596.3	− 2628	−31.7	× 43 / 225	−6.1
Sum, rounded to a whole point						−26

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,561	2444.2	− 2436	8.2	× 19 / 200	0.8
4	40,562	2446.7	− 2485	−38.3	× 30 / 200	−5.7
5	40,563	2479.3	− 2528	−48.7	× 18 / 200	−4.4
6	40,564	2516.7	− 2552	−35.3	× 36 / 200	−6.4
7	40,565	2573.3	− 2567	6.3	× 35 / 200	1.1
8	40,566	2574.4	− 2586	−11.6	× 32 / 200	−1.9
11	40,567	2584.9	− 2628	−43.1	× 30 / 200	−6.5
Sum, rounded to a whole point						−23

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,471	2434.4	− 2436	−1.6	× 29 / 201	−0.2
4	40,472	2448.3	− 2485	−36.7	× 19 / 201	−3.5
5	40,473	2458.9	− 2528	−69.1	× 31 / 201	−10.7
6	40,474	2501.9	− 2552	−50.1	× 24 / 201	−6
7	40,475	2582.2	− 2567	15.2	× 33 / 201	2.5
8	40,476	2638.2	− 2586	52.2	× 34 / 201	8.8
11	40,477	2588.5	− 2628	−39.5	× 31 / 201	−6.1
Sum, rounded to a whole point						−15

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −20, −15, −8, −15, −24, −57, −27, −38, −26, −23, −15 → −24.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 5 · 2016→2017: 7 · 2017→2018: 7 · 2018→2019: 9 · 2019→2021: 33 · 2021→2022: 30 · 2022→2023: 11 · 2023→2024: 12 · 2024→2025: 3 · 2025→2026: 8 → average 12.5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 12.5 × 2.66 = 33.3. Upper limit 8.9, lower limit −57.7.

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.

Mendocino Unified