Trona Joint 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	68,456	2377.7	− 2432	−54.3	× 21 / 128	−8.9
4	68,458	2443.3	− 2473	−29.7	× 21 / 128	−4.9
5	68,461	2440.3	− 2502	−61.7	× 17 / 128	−8.2
6	68,462	2456.4	− 2531	−74.6	× 14 / 128	−8.2
7	68,464	2485.6	− 2552	−66.4	× 25 / 128	−13
8	68,467	2489.9	− 2567	−77.1	× 14 / 128	−8.4
11	68,468	2568.4	− 2583	−14.6	× 16 / 128	−1.8
Sum, rounded to a whole point						−53

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,413	2372.5	− 2432	−59.5	× 22 / 148	−8.8
4	63,416	2423.6	− 2473	−49.4	× 25 / 148	−8.3
5	63,417	2488.3	− 2502	−13.7	× 23 / 148	−2.1
6	63,420	2468.9	− 2531	−62.1	× 19 / 148	−8
7	63,422	2452.3	− 2552	−99.7	× 18 / 148	−12.1
8	63,423	2502.7	− 2567	−64.3	× 22 / 148	−9.6
11	63,426	2514.4	− 2583	−68.6	× 19 / 148	−8.8
Sum, rounded to a whole point						−58

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,191	2397.4	− 2432	−34.6	× 20 / 143	−4.8
4	65,193	2413.0	− 2473	−60	× 23 / 143	−9.7
5	65,196	2478.9	− 2502	−23.1	× 21 / 143	−3.4
6	65,198	2507.8	− 2531	−23.2	× 25 / 143	−4.1
7	65,199	2487.0	− 2552	−65	× 20 / 143	−9.1
8	65,201	2523.8	− 2567	−43.2	× 18 / 143	−5.4
11	65,204	2569.1	− 2583	−13.9	× 16 / 143	−1.6
Sum, rounded to a whole point						−38

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,277	2410.4	− 2432	−21.6	× 15 / 133	−2.4
4	65,280	2443.5	− 2473	−29.5	× 20 / 133	−4.4
5	65,281	2414.1	− 2502	−87.9	× 22 / 133	−14.5
6	65,284	2536.8	− 2531	5.8	× 21 / 133	0.9
7	65,285	2532.6	− 2552	−19.4	× 23 / 133	−3.4
8	65,288	2491.7	− 2567	−75.3	× 19 / 133	−10.8
11	65,289	2520.7	− 2583	−62.3	× 13 / 133	−6.1
Sum, rounded to a whole point						−41

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,642	2395.0	− 2432	−37	× 23 / 144	−5.9
4	65,643	2427.7	− 2473	−45.3	× 17 / 144	−5.3
5	65,644	2490.5	− 2502	−11.5	× 19 / 144	−1.5
6	65,645	2480.7	− 2531	−50.3	× 20 / 144	−7
7	65,646	2521.1	− 2552	−30.9	× 26 / 144	−5.6
8	65,647	2553.6	− 2567	−13.4	× 21 / 144	−2
11	65,648	2579.1	− 2583	−3.9	× 18 / 144	−0.5
Sum, rounded to a whole point						−28

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,241	2315.6	− 2432	−116.4	× 14 / 119	−13.7
4	64,242	2355.7	− 2473	−117.3	× 14 / 119	−13.8
5	64,243	2454.0	− 2502	−48	× 23 / 119	−9.3
6	64,244	2475.2	− 2531	−55.8	× 19 / 119	−8.9
7	64,245	2460.3	− 2552	−91.7	× 16 / 119	−12.3
8	64,246	2520.2	− 2567	−46.8	× 16 / 119	−6.3
11	64,247	2534.5	− 2583	−48.5	× 17 / 119	−6.9
Sum, rounded to a whole point						−71

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,727	2347.8	− 2432	−84.2	× 22 / 70	−26.5
5	65,729	2452.4	− 2502	−49.6	× 21 / 70	−14.9
6	65,730	2455.2	− 2531	−75.8	× 13 / 70	−14.1
7	65,731	2469.4	− 2552	−82.6	× 14 / 70	−16.5
Sum, rounded to a whole point						−72

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,734	2325.7	− 2432	−106.3	× 13 / 109	−12.7
4	65,735	2420.5	− 2473	−52.5	× 21 / 109	−10.1
5	65,736	2398.5	− 2502	−103.5	× 13 / 109	−12.3
6	65,737	2479.9	− 2531	−51.1	× 19 / 109	−8.9
7	65,738	2385.8	− 2552	−166.2	× 13 / 109	−19.8
8	65,739	2472.8	− 2567	−94.2	× 17 / 109	−14.7
11	65,740	2434.9	− 2583	−148.1	× 13 / 109	−17.7
Sum, rounded to a whole point						−96

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,702	2323.2	− 2432	−108.8	× 17 / 103	−18
4	65,703	2393.5	− 2473	−79.5	× 16 / 103	−12.3
5	65,704	2457.5	− 2502	−44.5	× 23 / 103	−9.9
6	65,705	2449.4	− 2531	−81.6	× 13 / 103	−10.3
7	65,706	2402.5	− 2552	−149.5	× 22 / 103	−31.9
8	65,707	2335.7	− 2567	−231.3	× 12 / 103	−26.9
Sum, rounded to a whole point						−109

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,462	2359.0	− 2432	−73	× 25 / 118	−15.5
4	65,463	2393.0	− 2473	−80	× 16 / 118	−10.8
5	65,464	2439.1	− 2502	−62.9	× 18 / 118	−9.6
6	65,465	2442.0	− 2531	−89	× 23 / 118	−17.3
7	65,466	2397.5	− 2552	−154.5	× 15 / 118	−19.6
8	65,467	2450.0	− 2567	−117	× 21 / 118	−20.8
Sum, rounded to a whole point						−94

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,432	2345.0	− 2432	−87	× 13 / 132	−8.6
4	65,433	2403.3	− 2473	−69.7	× 27 / 132	−14.3
5	65,434	2428.5	− 2502	−73.5	× 15 / 132	−8.4
6	65,435	2446.9	− 2531	−84.1	× 17 / 132	−10.8
7	65,436	2429.3	− 2552	−122.7	× 25 / 132	−23.2
8	65,437	2413.5	− 2567	−153.5	× 15 / 132	−17.4
11	65,438	2444.4	− 2583	−138.6	× 20 / 132	−21
Sum, rounded to a whole point						−104

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −53, −58, −38, −41, −28, −71, −72, −96, −109, −94, −104 → −69.5
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: 20 · 2017→2018: 3 · 2018→2019: 13 · 2019→2021: 43 · 2021→2022: 1 · 2022→2023: 24 · 2023→2024: 13 · 2024→2025: 15 · 2025→2026: 10 → average 14.7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 14.7 × 2.66 = 39.1. Upper limit −30.4, lower limit −108.6.

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.

Trona Joint Unified