Mountain Home Charter (Alternative): english

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	41,770	2414.6	− 2432	−17.4	× 14 / 99	−2.5
4	41,772	2442.2	− 2473	−30.8	× 13 / 99	−4
5	41,773	2524.1	− 2502	22.1	× 16 / 99	3.6
6	41,776	2513.3	− 2531	−17.7	× 12 / 99	−2.1
7	41,777	2577.5	− 2552	25.5	× 23 / 99	5.9
8	41,780	2591.5	− 2567	24.5	× 21 / 99	5.2
Sum, rounded to a whole point						6

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	38,649	2413.8	− 2432	−18.2	× 31 / 158	−3.6
4	38,651	2500.3	− 2473	27.3	× 26 / 158	4.5
5	38,654	2515.9	− 2502	13.9	× 25 / 158	2.2
6	38,656	2546.3	− 2531	15.3	× 29 / 158	2.8
7	38,658	2562.1	− 2552	10.1	× 16 / 158	1
8	38,660	2606.3	− 2567	39.3	× 31 / 158	7.7
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	39,596	2407.8	− 2432	−24.2	× 36 / 196	−4.4
4	39,598	2443.6	− 2473	−29.4	× 38 / 196	−5.7
5	39,601	2516.2	− 2502	14.2	× 33 / 196	2.4
6	39,602	2519.5	− 2531	−11.5	× 30 / 196	−1.8
7	39,605	2588.3	− 2552	36.3	× 38 / 196	7
8	39,606	2545.6	− 2567	−21.4	× 21 / 196	−2.3
Sum, rounded to a whole point						−5

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,621	2407.8	− 2432	−24.2	× 37 / 214	−4.2
4	39,624	2448.0	− 2473	−25	× 39 / 214	−4.6
5	39,625	2484.1	− 2502	−17.9	× 40 / 214	−3.3
6	39,628	2540.4	− 2531	9.4	× 27 / 214	1.2
7	39,629	2543.9	− 2552	−8.1	× 37 / 214	−1.4
8	39,632	2570.6	− 2567	3.6	× 34 / 214	0.6
Sum, rounded to a whole point						−12

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,773	2417.0	− 2432	−15	× 42 / 233	−2.7
4	39,774	2480.6	− 2473	7.6	× 38 / 233	1.2
5	39,775	2482.4	− 2502	−19.6	× 41 / 233	−3.4
6	39,776	2524.7	− 2531	−6.3	× 46 / 233	−1.2
7	39,777	2586.4	− 2552	34.4	× 29 / 233	4.3
8	39,778	2543.0	− 2567	−24	× 37 / 233	−3.8
Sum, rounded to a whole point						−6

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,556	2367.9	− 2432	−64.1	× 20 / 150	−8.5
4	39,557	2416.8	− 2473	−56.2	× 28 / 150	−10.5
5	39,558	2461.7	− 2502	−40.3	× 29 / 150	−7.8
6	39,559	2472.8	− 2531	−58.2	× 27 / 150	−10.5
7	39,560	2574.6	− 2552	22.6	× 20 / 150	3
8	39,561	2566.4	− 2567	−0.6	× 26 / 150	−0.1
Sum, rounded to a whole point						−34

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,617	2393.1	− 2432	−38.9	× 23 / 129	−6.9
4	39,618	2444.3	− 2473	−28.7	× 18 / 129	−4
5	39,619	2510.8	− 2502	8.8	× 19 / 129	1.3
6	39,620	2532.7	− 2531	1.7	× 26 / 129	0.3
7	39,621	2520.8	− 2552	−31.2	× 23 / 129	−5.6
8	39,622	2613.3	− 2567	46.3	× 20 / 129	7.2
Sum, rounded to a whole point						−8

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,434	2394.1	− 2432	−37.9	× 18 / 139	−4.9
4	39,435	2425.9	− 2473	−47.1	× 26 / 139	−8.8
5	39,436	2479.0	− 2502	−23	× 22 / 139	−3.6
6	39,437	2513.9	− 2531	−17.1	× 24 / 139	−3
7	39,438	2585.0	− 2552	33	× 24 / 139	5.7
8	39,439	2552.8	− 2567	−14.2	× 25 / 139	−2.6
Sum, rounded to a whole point						−17

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,209	2422.0	− 2432	−10	× 24 / 140	−1.7
4	39,210	2469.9	− 2473	−3.1	× 23 / 140	−0.5
5	39,211	2492.2	− 2502	−9.8	× 25 / 140	−1.8
6	39,212	2521.0	− 2531	−10	× 22 / 140	−1.6
7	39,213	2571.2	− 2552	19.2	× 26 / 140	3.6
8	39,214	2624.2	− 2567	57.2	× 20 / 140	8.2
Sum, rounded to a whole point						6

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 6, 15, −5, −12, −6, −34, −8, −17, 6 → −6.1
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: 20 · 2017→2018: 7 · 2018→2019: 6 · 2019→2022: 28 · 2022→2023: 26 · 2023→2024: 9 · 2024→2025: 23 → average 16
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 16 × 2.66 = 42.6. Upper limit 36.5, lower limit −48.7.

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. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.