Lafayette 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 5.

All students

3rd The average 3rd grader scores 14 points under the grade 3 bar. 2422 vs. 2436.
4th The average 4th grader scores 23 points under the grade 4 bar. 2462 vs. 2485.
5th The average 5th grader scores 36 points under the grade 5 bar. 2492 vs. 2528.

Students fluent in English

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

Grade bars 3rd 91 students Meets the grade 3 bar. 4th 113 students 16 points under the grade 4 bar. 5th 116 students 25 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 41 students 49 points under the grade 3 bar. 4th 26 students Just under the grade 3 bar. 5th 23 students Just 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	25,962	2402.6	− 2436	−33.4	× 164 / 445	−12.3
4	25,963	2436.5	− 2485	−48.5	× 135 / 445	−14.7
5	25,965	2459.9	− 2528	−68.1	× 146 / 445	−22.3
Sum, rounded to a whole point						−49

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,202	2414.8	− 2436	−21.2	× 160 / 448	−7.6
4	24,204	2436.2	− 2485	−48.8	× 146 / 448	−15.9
5	24,206	2455.8	− 2528	−72.2	× 142 / 448	−22.9
Sum, rounded to a whole point						−46

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,702	2430.4	− 2436	−5.6	× 156 / 436	−2
4	24,705	2436.9	− 2485	−48.1	× 143 / 436	−15.8
5	24,707	2455.8	− 2528	−72.2	× 137 / 436	−22.7
Sum, rounded to a whole point						−40

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,726	2474.6	− 2436	38.6	× 131 / 426	11.9
4	24,728	2482.0	− 2485	−3	× 149 / 426	−1
5	24,730	2491.1	− 2528	−36.9	× 146 / 426	−12.6
Sum, rounded to a whole point						−2

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,895	2477.9	− 2436	41.9	× 152 / 414	15.4
4	24,896	2498.9	− 2485	13.9	× 125 / 414	4.2
5	24,897	2521.1	− 2528	−6.9	× 137 / 414	−2.3
Sum, rounded to a whole point						17

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,174	2376.5	− 2436	−59.5	× 73 / 208	−20.9
4	24,175	2426.0	− 2485	−59	× 65 / 208	−18.4
5	24,176	2474.9	− 2528	−53.1	× 70 / 208	−17.9
Sum, rounded to a whole point						−57

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,842	2409.9	− 2436	−26.1	× 144 / 408	−9.2
4	24,843	2428.6	− 2485	−56.4	× 125 / 408	−17.3
5	24,844	2470.9	− 2528	−57.1	× 139 / 408	−19.5
Sum, rounded to a whole point						−46

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,791	2411.7	− 2436	−24.3	× 149 / 403	−9
4	24,792	2435.9	− 2485	−49.1	× 138 / 403	−16.8
5	24,793	2471.4	− 2528	−56.6	× 116 / 403	−16.3
Sum, rounded to a whole point						−42

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,643	2419.1	− 2436	−16.9	× 147 / 421	−5.9
4	24,644	2459.3	− 2485	−25.7	× 144 / 421	−8.8
5	24,645	2467.8	− 2528	−60.2	× 130 / 421	−18.6
Sum, rounded to a whole point						−33

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,532	2425.9	− 2436	−10.1	× 149 / 438	−3.4
4	24,533	2459.4	− 2485	−25.6	× 145 / 438	−8.5
5	24,534	2487.0	− 2528	−41	× 144 / 438	−13.5
Sum, rounded to a whole point						−25

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	24,560	2421.8	− 2436	−14.2	× 132 / 410	−4.6
4	24,561	2462.1	− 2485	−22.9	× 139 / 410	−7.8
5	24,562	2492.1	− 2528	−35.9	× 139 / 410	−12.2
Sum, rounded to a whole point						−25

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −49, −46, −40, −2, 17, −57, −46, −42, −33, −25, −25 → −31.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 3 · 2016→2017: 6 · 2017→2018: 38 · 2018→2019: 19 · 2019→2021: 74 · 2021→2022: 11 · 2022→2023: 4 · 2023→2024: 9 · 2024→2025: 8 · 2025→2026: 0 → average 17.2
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 17.2 × 2.66 = 45.8. Upper limit 14.2, lower limit −77.4.

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.