O. S. Hubbard Elementary: 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	86,132	2386.7	− 2432	−45.3	× 95 / 280	−15.4
4	86,133	2415.2	− 2473	−57.8	× 92 / 280	−19
5	86,136	2486.4	− 2502	−15.6	× 93 / 280	−5.2
Sum, rounded to a whole point						−40

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	79,947	2404.0	− 2432	−28	× 73 / 262	−7.8
4	79,949	2411.9	− 2473	−61.1	× 98 / 262	−22.9
5	79,950	2492.9	− 2502	−9.1	× 91 / 262	−3.2
Sum, rounded to a whole point						−34

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	82,133	2391.6	− 2432	−40.4	× 81 / 309	−10.6
4	82,135	2429.0	− 2473	−44	× 73 / 309	−10.4
5	82,138	2476.9	− 2502	−25.1	× 90 / 309	−7.3
6	82,139	2516.8	− 2531	−14.2	× 65 / 309	−3
Sum, rounded to a whole point						−31

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	82,332	2376.6	− 2432	−55.4	× 77 / 335	−12.7
4	82,335	2418.8	− 2473	−54.2	× 76 / 335	−12.3
5	82,336	2491.3	− 2502	−10.7	× 62 / 335	−2
6	82,339	2493.2	− 2531	−37.8	× 60 / 335	−6.8
7	82,340	2536.8	− 2552	−15.2	× 60 / 335	−2.7
Sum, rounded to a whole point						−37

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	82,943	2383.0	− 2432	−49	× 73 / 366	−9.8
4	82,944	2392.9	− 2473	−80.1	× 75 / 366	−16.4
5	82,945	2460.9	− 2502	−41.1	× 60 / 366	−6.7
6	82,946	2501.2	− 2531	−29.8	× 51 / 366	−4.2
7	82,947	2532.7	− 2552	−19.3	× 54 / 366	−2.8
8	82,948	2579.9	− 2567	12.9	× 53 / 366	1.9
Sum, rounded to a whole point						−38

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,130	2331.4	− 2432	−100.6	× 51 / 342	−15
4	83,131	2399.8	− 2473	−73.2	× 77 / 342	−16.5
5	83,132	2411.8	− 2502	−90.2	× 64 / 342	−16.9
6	83,133	2462.5	− 2531	−68.5	× 56 / 342	−11.2
7	83,134	2463.4	− 2552	−88.6	× 55 / 342	−14.2
8	83,135	2490.9	− 2567	−76.1	× 39 / 342	−8.7
Sum, rounded to a whole point						−83

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,101	2322.4	− 2432	−109.6	× 43 / 303	−15.6
4	83,102	2379.0	− 2473	−94	× 50 / 303	−15.5
5	83,103	2404.8	− 2502	−97.2	× 61 / 303	−19.6
6	83,104	2445.1	− 2531	−85.9	× 46 / 303	−13
7	83,105	2454.7	− 2552	−97.3	× 51 / 303	−16.4
8	83,106	2486.5	− 2567	−80.5	× 52 / 303	−13.8
Sum, rounded to a whole point						−94

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,110	2345.1	− 2432	−86.9	× 46 / 291	−13.7
4	83,111	2352.3	− 2473	−120.7	× 41 / 291	−17
5	83,112	2423.2	− 2502	−78.8	× 43 / 291	−11.6
6	83,113	2446.8	− 2531	−84.2	× 63 / 291	−18.2
7	83,114	2461.4	− 2552	−90.6	× 47 / 291	−14.6
8	83,115	2481.2	− 2567	−85.8	× 51 / 291	−15
Sum, rounded to a whole point						−90

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	82,790	2309.9	− 2432	−122.1	× 40 / 270	−18.1
4	82,791	2394.9	− 2473	−78.1	× 45 / 270	−13
5	82,792	2374.2	− 2502	−127.8	× 43 / 270	−20.4
6	82,793	2434.4	− 2531	−96.6	× 39 / 270	−14
7	82,794	2460.7	− 2552	−91.3	× 53 / 270	−17.9
8	82,795	2492.2	− 2567	−74.8	× 50 / 270	−13.9
Sum, rounded to a whole point						−97

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −40, −34, −31, −37, −38, −83, −94, −90, −97 → −60.4
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: 3 · 2017→2018: 6 · 2018→2019: 1 · 2019→2022: 45 · 2022→2023: 11 · 2023→2024: 4 · 2024→2025: 7 → average 10.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.4 × 2.66 = 27.7. Upper limit −32.7, lower limit −88.1.

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