Isabelle Jackson Elementary: math

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.

Measured against the grade bars

The state's math test uses one scale for every grade, so a score means the same thing in grade 3 as in grade 6.

All students

3rd The average 3rd grader scores 37 points under the grade 3 bar. 2399 vs. 2436.
4th The average 4th grader scores 36 points under the grade 4 bar. 2450 vs. 2485.
5th The average 5th grader scores 32 points under the grade 4 bar. 2453 vs. 2485. The 5th-grade bar is 2528.
6th The average 6th grader scores 25 points under the grade 5 bar. 2503 vs. 2528. The 6th-grade bar is 2552.

Students fluent in English

Math with English out of the way. Includes students who have only ever spoken English.

Grade bars 3rd 78 students 42 points under the grade 3 bar. 4th 86 students 33 points under the grade 4 bar. 5th 80 students 21 points under the grade 4 bar. 6th 95 students 16 points under the grade 5 bar.

English learners

Students leave this group as they become fluent, so its average stays low even where they learn well.

Grade bars 3rd 17 students 10 points under the grade 3 bar. 4th 20 students 48 points under the grade 4 bar. 5th 27 students 16 points under the grade 3 bar. 6th 16 students 24 points under the grade 4 bar.

the group's average that grade's own bar the distance between

2026 results. "Meets standard" is the state's mark for being on track for that grade. The state leaves out any group of ten students or fewer, so a grade may be missing from the charts.

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	60,331	2388.3	− 2436	−47.7	× 145 / 520	−13.3
4	60,333	2435.7	− 2485	−49.3	× 128 / 520	−12.1
5	60,335	2469.5	− 2528	−58.5	× 112 / 520	−12.6
6	60,337	2494.4	− 2552	−57.6	× 135 / 520	−15
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	56,028	2394.2	− 2436	−41.8	× 117 / 511	−9.6
4	56,030	2443.0	− 2485	−42	× 141 / 511	−11.6
5	56,032	2469.1	− 2528	−58.9	× 130 / 511	−15
6	56,033	2507.8	− 2552	−44.2	× 123 / 511	−10.6
Sum, rounded to a whole point						−47

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,661	2400.9	− 2436	−35.1	× 126 / 504	−8.8
4	57,662	2444.0	− 2485	−41	× 119 / 504	−9.7
5	57,665	2457.9	− 2528	−70.1	× 136 / 504	−18.9
6	57,667	2500.8	− 2552	−51.2	× 123 / 504	−12.5
Sum, rounded to a whole point						−50

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,796	2399.8	− 2436	−36.2	× 123 / 497	−9
4	57,797	2455.3	− 2485	−29.7	× 126 / 497	−7.5
5	57,799	2452.6	− 2528	−75.4	× 113 / 497	−17.1
6	57,801	2481.2	− 2552	−70.8	× 135 / 497	−19.2
Sum, rounded to a whole point						−53

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,051	2407.6	− 2436	−28.4	× 125 / 504	−7
4	58,052	2450.2	− 2485	−34.8	× 129 / 504	−8.9
5	58,053	2470.5	− 2528	−57.5	× 133 / 504	−15.2
6	58,054	2485.5	− 2552	−66.5	× 117 / 504	−15.4
Sum, rounded to a whole point						−47

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	56,738	2385.4	− 2436	−50.6	× 123 / 476	−13.1
4	56,739	2413.0	− 2485	−72	× 116 / 476	−17.5
5	56,740	2437.4	− 2528	−90.6	× 133 / 476	−25.3
6	56,741	2456.9	− 2552	−95.1	× 104 / 476	−20.8
Sum, rounded to a whole point						−77

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,092	2414.7	− 2436	−21.3	× 97 / 467	−4.4
4	58,093	2435.8	− 2485	−49.2	× 123 / 467	−13
5	58,094	2439.4	− 2528	−88.6	× 110 / 467	−20.9
6	58,095	2467.1	− 2552	−84.9	× 137 / 467	−24.9
Sum, rounded to a whole point						−63

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,066	2407.4	− 2436	−28.6	× 116 / 459	−7.2
4	58,067	2452.9	− 2485	−32.1	× 101 / 459	−7.1
5	58,068	2454.5	− 2528	−73.5	× 126 / 459	−20.2
6	58,069	2464.1	− 2552	−87.9	× 116 / 459	−22.2
Sum, rounded to a whole point						−57

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,963	2408.0	− 2436	−28	× 107 / 454	−6.6
4	57,964	2440.7	− 2485	−44.3	× 122 / 454	−11.9
5	57,965	2450.5	− 2528	−77.5	× 96 / 454	−16.4
6	57,966	2469.0	− 2552	−83	× 129 / 454	−23.6
Sum, rounded to a whole point						−58

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,722	2401.1	− 2436	−34.9	× 108 / 437	−8.6
4	57,723	2453.0	− 2485	−32	× 110 / 437	−8.1
5	57,724	2458.7	− 2528	−69.3	× 115 / 437	−18.2
6	57,725	2492.4	− 2552	−59.6	× 104 / 437	−14.2
Sum, rounded to a whole point						−49

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,643	2398.9	− 2436	−37.1	× 96 / 421	−8.5
4	57,644	2449.5	− 2485	−35.5	× 106 / 421	−8.9
5	57,645	2453.0	− 2528	−75	× 107 / 421	−19.1
6	57,646	2503.1	− 2552	−48.9	× 112 / 421	−13
Sum, rounded to a whole point						−49

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −53, −47, −50, −53, −47, −77, −63, −57, −58, −49, −49 → −54.8
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: 3 · 2018→2019: 6 · 2019→2021: 30 · 2021→2022: 14 · 2022→2023: 6 · 2023→2024: 1 · 2024→2025: 9 · 2025→2026: 0 → average 7.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7.8 × 2.66 = 20.7. Upper limit −34.1, lower limit −75.5.

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.