Rosamond 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 3 bar

The state's math test uses one scale for every grade, so a score means the same thing in grade 3 as in grade 5.

All students

3rd The average 3rd grader scores 64 points under the grade 3 bar. 2372 vs. 2436.
4th The average 4th grader scores 31 points under the grade 3 bar. 2405 vs. 2436. The 4th-grade bar is 2485.
5th The average 5th grader scores 24 points under the grade 3 bar. 2413 vs. 2436. The 5th-grade bar is 2528.

Students fluent in English

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

Grade bars 3rd 88 students 63 points under the grade 3 bar. 4th 112 students 27 points under the grade 3 bar. 5th 92 students 16 points under the grade 3 bar.

English learners

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

Grade bars 3rd 23 students 66 points under the grade 3 bar. 4th 29 students 49 points under the grade 3 bar. 5th 24 students 52 points under the grade 3 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	17,946	2365.7	− 2436	−70.3	× 138 / 375	−25.9
4	17,948	2438.4	− 2485	−46.6	× 107 / 375	−13.3
5	17,950	2458.4	− 2528	−69.6	× 130 / 375	−24.1
Sum, rounded to a whole point						−63

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	16,951	2372.3	− 2436	−63.7	× 144 / 388	−23.6
4	16,953	2424.1	− 2485	−60.9	× 130 / 388	−20.4
5	16,956	2459.1	− 2528	−68.9	× 114 / 388	−20.2
Sum, rounded to a whole point						−64

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	17,272	2371.0	− 2436	−65	× 138 / 408	−22
4	17,274	2420.6	− 2485	−64.4	× 135 / 408	−21.3
5	17,275	2446.1	− 2528	−81.9	× 135 / 408	−27.1
Sum, rounded to a whole point						−70

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	17,297	2347.8	− 2436	−88.2	× 133 / 410	−28.6
4	17,299	2419.3	− 2485	−65.7	× 141 / 410	−22.6
5	17,301	2438.8	− 2528	−89.2	× 136 / 410	−29.6
Sum, rounded to a whole point						−81

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	17,438	2378.2	− 2436	−57.8	× 137 / 394	−20.1
4	17,439	2393.0	− 2485	−92	× 122 / 394	−28.5
5	17,440	2459.8	− 2528	−68.2	× 135 / 394	−23.4
Sum, rounded to a whole point						−72

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	17,492	2331.8	− 2436	−104.2	× 147 / 429	−35.7
4	17,493	2374.5	− 2485	−110.5	× 139 / 429	−35.8
5	17,494	2399.7	− 2528	−128.3	× 143 / 429	−42.8
Sum, rounded to a whole point						−114

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	17,434	2347.4	− 2436	−88.6	× 113 / 387	−25.9
4	17,435	2375.7	− 2485	−109.3	× 135 / 387	−38.1
5	17,436	2393.8	− 2528	−134.2	× 139 / 387	−48.2
Sum, rounded to a whole point						−112

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	17,384	2355.7	− 2436	−80.3	× 124 / 380	−26.2
4	17,385	2397.6	− 2485	−87.4	× 120 / 380	−27.6
5	17,386	2395.6	− 2528	−132.4	× 136 / 380	−47.4
Sum, rounded to a whole point						−101

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	17,378	2364.3	− 2436	−71.7	× 147 / 399	−26.4
4	17,379	2397.8	− 2485	−87.2	× 125 / 399	−27.3
5	17,380	2410.2	− 2528	−117.8	× 127 / 399	−37.5
Sum, rounded to a whole point						−91

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	17,383	2372.2	− 2436	−63.8	× 111 / 368	−19.2
4	17,384	2404.7	− 2485	−80.3	× 141 / 368	−30.8
5	17,385	2412.5	− 2528	−115.5	× 116 / 368	−36.4
Sum, rounded to a whole point						−86

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −63, −64, −70, −81, −72, −114, −112, −101, −91, −86 → −85.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 1 · 2016→2017: 6 · 2017→2018: 11 · 2018→2019: 9 · 2019→2022: 42 · 2022→2023: 2 · 2023→2024: 11 · 2024→2025: 10 · 2025→2026: 5 → average 10.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.8 × 2.66 = 28.7. Upper limit −56.7, lower limit −114.1.

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.