Mojave River Academy - Oro Grande: 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.

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	64,259	2368.3	− 2473	−104.7	× 16 / 324	−5.2
5	64,260	2411.9	− 2502	−90.1	× 17 / 324	−4.7
6	64,261	2380.2	− 2531	−150.8	× 22 / 324	−10.2
7	64,262	2483.2	− 2552	−68.8	× 56 / 324	−11.9
8	64,263	2469.6	− 2567	−97.4	× 65 / 324	−19.5
11	64,264	2491.2	− 2583	−91.8	× 148 / 324	−41.9
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	64,331	2327.8	− 2432	−104.2	× 25 / 366	−7.1
4	64,332	2356.8	− 2473	−116.2	× 20 / 366	−6.3
5	64,333	2407.9	− 2502	−94.1	× 21 / 366	−5.4
6	64,334	2473.9	− 2531	−57.1	× 41 / 366	−6.4
7	64,335	2492.6	− 2552	−59.4	× 36 / 366	−5.8
8	64,336	2499.6	− 2567	−67.4	× 68 / 366	−12.5
11	64,337	2510.6	− 2583	−72.4	× 155 / 366	−30.7
Sum, rounded to a whole point						−74

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,314	2355.4	− 2432	−76.6	× 14 / 406	−2.6
4	64,315	2364.0	− 2473	−109	× 22 / 406	−5.9
5	64,316	2403.8	− 2502	−98.2	× 19 / 406	−4.6
6	64,317	2451.1	− 2531	−79.9	× 31 / 406	−6.1
7	64,318	2470.3	− 2552	−81.7	× 61 / 406	−12.3
8	64,319	2465.8	− 2567	−101.2	× 59 / 406	−14.7
11	64,320	2495.1	− 2583	−87.9	× 200 / 406	−43.3
Sum, rounded to a whole point						−90

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,288	2359.0	− 2432	−73	× 12 / 378	−2.3
4	64,289	2370.5	− 2473	−102.5	× 13 / 378	−3.5
5	64,290	2443.9	− 2502	−58.1	× 19 / 378	−2.9
6	64,291	2450.7	− 2531	−80.3	× 33 / 378	−7
7	64,292	2483.3	− 2552	−68.7	× 45 / 378	−8.2
8	64,293	2486.2	− 2567	−80.8	× 95 / 378	−20.3
11	64,294	2529.6	− 2583	−53.4	× 161 / 378	−22.7
Sum, rounded to a whole point						−67

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,052	2356.0	− 2432	−76	× 12 / 456	−2
4	64,053	2395.3	− 2473	−77.7	× 19 / 456	−3.2
5	64,054	2389.3	− 2502	−112.7	× 28 / 456	−6.9
6	64,055	2451.6	− 2531	−79.4	× 48 / 456	−8.4
7	64,056	2451.4	− 2552	−100.6	× 58 / 456	−12.8
8	64,057	2478.2	− 2567	−88.8	× 85 / 456	−16.6
11	64,058	2525.3	− 2583	−57.7	× 206 / 456	−26.1
Sum, rounded to a whole point						−76

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −94, −74, −90, −67, −76 → −80.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2019→2022: 20 · 2022→2023: 16 · 2023→2024: 23 · 2024→2025: 9 → average 17
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 17 × 2.66 = 45.2. Upper limit −35, lower limit −125.4.

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 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.