Klamath-Trinity Joint 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	13,788	2338.6	− 2436	−97.4	× 82 / 485	−16.5
4	13,791	2411.7	− 2485	−73.3	× 81 / 485	−12.2
5	13,792	2386.5	− 2528	−141.5	× 72 / 485	−21
6	13,795	2396.8	− 2552	−155.2	× 67 / 485	−21.4
7	13,796	2434.6	− 2567	−132.4	× 66 / 485	−18
8	13,799	2415.5	− 2586	−170.5	× 73 / 485	−25.7
11	13,800	2506.0	− 2628	−122	× 44 / 485	−11.1
Sum, rounded to a whole point						−126

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	12,818	2354.3	− 2436	−81.7	× 73 / 508	−11.7
4	12,821	2406.2	− 2485	−78.8	× 83 / 508	−12.9
5	12,822	2424.9	− 2528	−103.1	× 80 / 508	−16.2
6	12,825	2384.5	− 2552	−167.5	× 71 / 508	−23.4
7	12,827	2437.0	− 2567	−130	× 69 / 508	−17.7
8	12,828	2454.8	− 2586	−131.2	× 68 / 508	−17.6
11	12,831	2491.4	− 2628	−136.6	× 64 / 508	−17.2
Sum, rounded to a whole point						−117

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,153	2353.0	− 2436	−83	× 85 / 500	−14.1
4	13,155	2398.5	− 2485	−86.5	× 73 / 500	−12.6
5	13,158	2418.7	− 2528	−109.3	× 85 / 500	−18.6
6	13,160	2398.6	− 2552	−153.4	× 81 / 500	−24.9
7	13,162	2422.1	− 2567	−144.9	× 62 / 500	−18
8	13,164	2417.0	− 2586	−169	× 60 / 500	−20.3
11	13,165	2501.7	− 2628	−126.3	× 54 / 500	−13.6
Sum, rounded to a whole point						−122

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,168	2361.4	− 2436	−74.6	× 71 / 493	−10.7
4	13,169	2405.2	− 2485	−79.8	× 84 / 493	−13.6
5	13,172	2426.8	− 2528	−101.2	× 69 / 493	−14.2
6	13,173	2417.1	− 2552	−134.9	× 78 / 493	−21.3
7	13,176	2428.3	− 2567	−138.7	× 76 / 493	−21.4
8	13,177	2416.5	− 2586	−169.5	× 57 / 493	−19.6
11	13,180	2464.8	− 2628	−163.2	× 58 / 493	−19.2
Sum, rounded to a whole point						−120

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,298	2358.2	− 2436	−77.8	× 77 / 511	−11.7
4	13,299	2410.2	− 2485	−74.8	× 78 / 511	−11.4
5	13,300	2412.8	− 2528	−115.2	× 86 / 511	−19.4
6	13,301	2440.3	− 2552	−111.7	× 63 / 511	−13.8
7	13,302	2429.9	− 2567	−137.1	× 70 / 511	−18.8
8	13,303	2440.0	− 2586	−146	× 77 / 511	−22
11	13,304	2451.3	− 2628	−176.7	× 60 / 511	−20.7
Sum, rounded to a whole point						−118

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,323	2339.3	− 2436	−96.7	× 42 / 439	−9.3
4	13,324	2389.6	− 2485	−95.4	× 57 / 439	−12.4
5	13,325	2393.5	− 2528	−134.5	× 75 / 439	−23
6	13,326	2415.3	− 2552	−136.7	× 67 / 439	−20.9
7	13,327	2387.5	− 2567	−179.5	× 60 / 439	−24.5
8	13,328	2408.2	− 2586	−177.8	× 73 / 439	−29.6
11	13,329	2472.6	− 2628	−155.4	× 65 / 439	−23
Sum, rounded to a whole point						−143

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,300	2342.8	− 2436	−93.2	× 58 / 364	−14.9
4	13,301	2376.7	− 2485	−108.3	× 47 / 364	−14
5	13,302	2456.0	− 2528	−72	× 25 / 364	−4.9
6	13,303	2389.7	− 2552	−162.3	× 52 / 364	−23.2
7	13,304	2411.9	− 2567	−155.1	× 57 / 364	−24.3
8	13,305	2403.6	− 2586	−182.4	× 55 / 364	−27.6
11	13,306	2500.6	− 2628	−127.4	× 70 / 364	−24.5
Sum, rounded to a whole point						−133

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,261	2314.3	− 2436	−121.7	× 42 / 369	−13.9
4	13,262	2386.4	− 2485	−98.6	× 60 / 369	−16
5	13,263	2398.3	− 2528	−129.7	× 38 / 369	−13.4
6	13,264	2424.1	− 2552	−127.9	× 63 / 369	−21.8
7	13,265	2418.2	− 2567	−148.8	× 67 / 369	−27
8	13,266	2450.0	− 2586	−136	× 52 / 369	−19.2
11	13,267	2509.2	− 2628	−118.8	× 47 / 369	−15.1
Sum, rounded to a whole point						−126

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,227	2336.2	− 2436	−99.8	× 49 / 425	−11.5
4	13,228	2393.2	− 2485	−91.8	× 63 / 425	−13.6
5	13,229	2407.2	− 2528	−120.8	× 63 / 425	−17.9
6	13,230	2409.0	− 2552	−143	× 45 / 425	−15.1
7	13,231	2455.1	− 2567	−111.9	× 59 / 425	−15.5
8	13,232	2437.6	− 2586	−148.4	× 74 / 425	−25.8
11	13,233	2505.7	− 2628	−122.3	× 72 / 425	−20.7
Sum, rounded to a whole point						−120

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −126, −117, −122, −120, −118, −143, −133, −126, −120 → −125
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: 5 · 2017→2018: 2 · 2018→2019: 2 · 2019→2022: 25 · 2022→2023: 10 · 2023→2024: 7 · 2024→2025: 6 → average 8.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8.3 × 2.66 = 22.1. Upper limit −102.9, lower limit −147.1.

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.