Southern Humboldt 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	14,206	2407.5	− 2436	−28.5	× 64 / 360	−5.1
4	14,209	2425.2	− 2485	−59.8	× 52 / 360	−8.6
5	14,210	2473.8	− 2528	−54.2	× 60 / 360	−9
6	14,213	2510.7	− 2552	−41.3	× 51 / 360	−5.9
7	14,214	2515.2	− 2567	−51.8	× 42 / 360	−6
8	14,217	2510.6	− 2586	−75.4	× 61 / 360	−12.8
11	14,218	2508.7	− 2628	−119.3	× 30 / 360	−9.9
Sum, rounded to a whole point						−57

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,226	2411.1	− 2436	−24.9	× 63 / 380	−4.1
4	13,229	2461.6	− 2485	−23.4	× 63 / 380	−3.9
5	13,230	2441.9	− 2528	−86.1	× 51 / 380	−11.6
6	13,232	2492.4	− 2552	−59.6	× 61 / 380	−9.6
7	13,234	2539.7	− 2567	−27.3	× 62 / 380	−4.5
8	13,237	2544.4	− 2586	−41.6	× 48 / 380	−5.3
11	13,239	2482.9	− 2628	−145.1	× 32 / 380	−12.2
Sum, rounded to a whole point						−51

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,560	2407.9	− 2436	−28.1	× 58 / 399	−4.1
4	13,561	2448.6	− 2485	−36.4	× 57 / 399	−5.2
5	13,563	2479.5	− 2528	−48.5	× 68 / 399	−8.3
6	13,566	2480.2	− 2552	−71.8	× 52 / 399	−9.4
7	13,568	2518.2	− 2567	−48.8	× 70 / 399	−8.6
8	13,569	2557.3	− 2586	−28.7	× 55 / 399	−4
11	13,571	2572.0	− 2628	−56	× 39 / 399	−5.5
Sum, rounded to a whole point						−45

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,554	2406.7	− 2436	−29.3	× 50 / 404	−3.6
4	13,555	2455.3	− 2485	−29.7	× 56 / 404	−4.1
5	13,558	2458.3	− 2528	−69.7	× 57 / 404	−9.8
6	13,559	2499.3	− 2552	−52.7	× 68 / 404	−8.9
7	13,562	2496.2	− 2567	−70.8	× 58 / 404	−10.2
8	13,563	2491.8	− 2586	−94.2	× 68 / 404	−15.9
11	13,566	2530.0	− 2628	−98	× 47 / 404	−11.4
Sum, rounded to a whole point						−64

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,682	2410.2	− 2436	−25.8	× 57 / 379	−3.9
4	13,683	2462.3	− 2485	−22.7	× 47 / 379	−2.8
5	13,684	2450.8	− 2528	−77.2	× 56 / 379	−11.4
6	13,685	2505.9	− 2552	−46.1	× 56 / 379	−6.8
7	13,686	2507.0	− 2567	−60	× 66 / 379	−10.4
8	13,687	2522.4	− 2586	−63.6	× 57 / 379	−9.6
11	13,688	2497.9	− 2628	−130.1	× 40 / 379	−13.7
Sum, rounded to a whole point						−59

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,705	2384.7	− 2436	−51.3	× 43 / 325	−6.8
4	13,706	2431.5	− 2485	−53.5	× 44 / 325	−7.2
5	13,707	2424.7	− 2528	−103.3	× 50 / 325	−15.9
6	13,708	2430.0	− 2552	−122	× 44 / 325	−16.5
7	13,709	2455.1	− 2567	−111.9	× 43 / 325	−14.8
8	13,710	2464.8	− 2586	−121.2	× 51 / 325	−19
11	13,711	2466.9	− 2628	−161.1	× 50 / 325	−24.8
Sum, rounded to a whole point						−105

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,682	2394.3	− 2436	−41.7	× 48 / 319	−6.3
4	13,683	2413.7	− 2485	−71.3	× 39 / 319	−8.7
5	13,684	2441.8	− 2528	−86.2	× 37 / 319	−10
6	13,685	2469.8	− 2552	−82.2	× 46 / 319	−11.9
7	13,686	2464.1	− 2567	−102.9	× 48 / 319	−15.5
8	13,687	2418.6	− 2586	−167.4	× 42 / 319	−22
11	13,688	2487.9	− 2628	−140.1	× 59 / 319	−25.9
Sum, rounded to a whole point						−100

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,649	2383.7	− 2436	−52.3	× 39 / 313	−6.5
4	13,650	2438.6	− 2485	−46.4	× 51 / 313	−7.6
5	13,651	2430.0	− 2528	−98	× 42 / 313	−13.2
6	13,652	2484.6	− 2552	−67.4	× 43 / 313	−9.3
7	13,653	2477.1	− 2567	−89.9	× 47 / 313	−13.5
8	13,654	2447.3	− 2586	−138.7	× 50 / 313	−22.2
11	13,655	2476.5	− 2628	−151.5	× 41 / 313	−19.8
Sum, rounded to a whole point						−92

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,605	2397.0	− 2436	−39	× 50 / 311	−6.3
4	13,606	2420.6	− 2485	−64.4	× 37 / 311	−7.7
5	13,607	2439.5	− 2528	−88.5	× 52 / 311	−14.8
6	13,608	2459.5	− 2552	−92.5	× 35 / 311	−10.4
7	13,609	2493.9	− 2567	−73.1	× 46 / 311	−10.8
8	13,610	2492.1	− 2586	−93.9	× 42 / 311	−12.7
11	13,611	2474.5	− 2628	−153.5	× 49 / 311	−24.2
Sum, rounded to a whole point						−87

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −57, −51, −45, −64, −59, −105, −100, −92, −87 → −73.3
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 6 · 2016→2017: 6 · 2017→2018: 19 · 2018→2019: 5 · 2019→2022: 46 · 2022→2023: 5 · 2023→2024: 8 · 2024→2025: 5 → average 12.5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 12.5 × 2.66 = 33.3. Upper limit −40, lower limit −106.6.

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.