Mendocino Unified: english

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	43,284	2390.2	− 2432	−41.8	× 37 / 259	−6
4	43,285	2432.7	− 2473	−40.3	× 41 / 259	−6.4
5	43,288	2501.9	− 2502	−0.1	× 34 / 259	0
6	43,290	2513.7	− 2531	−17.3	× 30 / 259	−2
7	43,291	2531.2	− 2552	−20.8	× 32 / 259	−2.6
8	43,294	2590.4	− 2567	23.4	× 42 / 259	3.8
11	43,296	2638.0	− 2583	55	× 43 / 259	9.1
Sum, rounded to a whole point						−4

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,980	2439.7	− 2432	7.7	× 39 / 255	1.2
4	39,981	2447.1	− 2473	−25.9	× 42 / 255	−4.3
5	39,984	2468.8	− 2502	−33.2	× 39 / 255	−5.1
6	39,985	2525.4	− 2531	−5.6	× 36 / 255	−0.8
7	39,988	2589.5	− 2552	37.5	× 31 / 255	4.6
8	39,990	2579.1	− 2567	12.1	× 34 / 255	1.6
11	39,991	2607.7	− 2583	24.7	× 34 / 255	3.3
Sum, rounded to a whole point						1

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,997	2413.6	− 2432	−18.4	× 31 / 272	−2.1
4	40,999	2473.7	− 2473	0.7	× 41 / 272	0.1
5	41,000	2510.2	− 2502	8.2	× 44 / 272	1.3
6	41,003	2509.2	− 2531	−21.8	× 39 / 272	−3.1
7	41,004	2560.2	− 2552	8.2	× 33 / 272	1
8	41,006	2599.2	− 2567	32.2	× 36 / 272	4.3
11	41,008	2650.4	− 2583	67.4	× 48 / 272	11.9
Sum, rounded to a whole point						13

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,016	2443.7	− 2432	11.7	× 29 / 263	1.3
4	41,017	2449.7	− 2473	−23.3	× 33 / 263	−2.9
5	41,019	2510.3	− 2502	8.3	× 44 / 263	1.4
6	41,022	2532.7	− 2531	1.7	× 46 / 263	0.3
7	41,023	2543.0	− 2552	−9	× 41 / 263	−1.4
8	41,025	2577.6	− 2567	10.6	× 32 / 263	1.3
11	41,028	2600.7	− 2583	17.7	× 38 / 263	2.6
Sum, rounded to a whole point						2

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,163	2422.5	− 2432	−9.5	× 35 / 278	−1.2
4	41,164	2454.7	− 2473	−18.3	× 33 / 278	−2.2
5	41,165	2508.8	− 2502	6.8	× 32 / 278	0.8
6	41,166	2518.2	− 2531	−12.8	× 50 / 278	−2.3
7	41,167	2538.3	− 2552	−13.7	× 42 / 278	−2.1
8	41,168	2577.6	− 2567	10.6	× 49 / 278	1.9
11	41,169	2648.9	− 2583	65.9	× 37 / 278	8.8
Sum, rounded to a whole point						4

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,090	2401.4	− 2432	−30.6	× 22 / 173	−3.9
4	40,091	2448.5	− 2473	−24.5	× 21 / 173	−3
5	40,092	2492.3	− 2502	−9.7	× 35 / 173	−2
6	40,093	2525.0	− 2531	−6	× 24 / 173	−0.8
7	40,094	2530.0	− 2552	−22	× 16 / 173	−2
8	40,095	2548.6	− 2567	−18.4	× 25 / 173	−2.7
11	40,096	2641.2	− 2583	58.2	× 30 / 173	10.1
Sum, rounded to a whole point						−4

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,920	2391.0	− 2432	−41	× 31 / 206	−6.2
4	40,921	2466.6	− 2473	−6.4	× 28 / 206	−0.9
5	40,922	2485.6	− 2502	−16.4	× 28 / 206	−2.2
6	40,923	2502.3	− 2531	−28.7	× 37 / 206	−5.2
7	40,924	2560.0	− 2552	8	× 24 / 206	0.9
8	40,925	2611.4	− 2567	44.4	× 21 / 206	4.5
11	40,926	2610.7	− 2583	27.7	× 37 / 206	5
Sum, rounded to a whole point						−4

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,947	2438.4	− 2432	6.4	× 20 / 197	0.6
4	40,948	2445.1	− 2473	−27.9	× 28 / 197	−4
5	40,949	2521.7	− 2502	19.7	× 29 / 197	2.9
6	40,950	2506.7	− 2531	−24.3	× 25 / 197	−3.1
7	40,951	2543.7	− 2552	−8.3	× 39 / 197	−1.6
8	40,952	2556.2	− 2567	−10.8	× 29 / 197	−1.6
11	40,953	2624.2	− 2583	41.2	× 27 / 197	5.6
Sum, rounded to a whole point						−1

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,774	2405.7	− 2432	−26.3	× 29 / 225	−3.4
4	40,775	2453.4	− 2473	−19.6	× 20 / 225	−1.7
5	40,776	2509.2	− 2502	7.2	× 30 / 225	1
6	40,777	2558.1	− 2531	27.1	× 33 / 225	4
7	40,778	2539.9	− 2552	−12.1	× 29 / 225	−1.6
8	40,779	2565.5	− 2567	−1.5	× 41 / 225	−0.3
11	40,780	2651.4	− 2583	68.4	× 43 / 225	13.1
Sum, rounded to a whole point						11

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,553	2423.3	− 2432	−8.7	× 19 / 202	−0.8
4	40,554	2452.6	− 2473	−20.4	× 30 / 202	−3
5	40,555	2511.4	− 2502	9.4	× 18 / 202	0.8
6	40,556	2515.2	− 2531	−15.8	× 36 / 202	−2.8
7	40,557	2583.0	− 2552	31	× 35 / 202	5.4
8	40,558	2572.0	− 2567	5	× 32 / 202	0.8
11	40,559	2628.7	− 2583	45.7	× 32 / 202	7.2
Sum, rounded to a whole point						8

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −4, 1, 13, 2, 4, −4, −4, −1, 11, 8 → 2.6
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: 12 · 2017→2018: 11 · 2018→2019: 2 · 2019→2021: 8 · 2021→2022: 0 · 2022→2023: 3 · 2023→2024: 12 · 2024→2025: 3 → average 6.2
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.2 × 2.66 = 16.5. Upper limit 19.1, lower limit −13.9.

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.