Luther Burbank: english

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	87,779	2400.4	− 2432	−31.6	× 58 / 335	−5.5
4	87,782	2430.6	− 2473	−42.4	× 63 / 335	−8
5	87,783	2472.5	− 2502	−29.5	× 47 / 335	−4.1
6	87,786	2506.0	− 2531	−25	× 62 / 335	−4.6
7	87,787	2513.6	− 2552	−38.4	× 56 / 335	−6.4
8	87,790	2549.7	− 2567	−17.3	× 49 / 335	−2.5
Sum, rounded to a whole point						−31

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,456	2434.4	− 2432	2.4	× 49 / 331	0.4
4	81,457	2405.1	− 2473	−67.9	× 63 / 331	−12.9
5	81,459	2469.4	− 2502	−32.6	× 61 / 331	−6
6	81,461	2511.7	− 2531	−19.3	× 47 / 331	−2.7
7	81,463	2506.7	− 2552	−45.3	× 56 / 331	−7.7
8	81,465	2540.8	− 2567	−26.2	× 55 / 331	−4.4
Sum, rounded to a whole point						−33

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,727	2388.0	− 2432	−44	× 64 / 330	−8.5
4	83,730	2480.6	− 2473	7.6	× 50 / 330	1.2
5	83,732	2466.1	− 2502	−35.9	× 55 / 330	−6
6	83,734	2485.2	− 2531	−45.8	× 62 / 330	−8.6
7	83,735	2497.9	− 2552	−54.1	× 44 / 330	−7.2
8	83,737	2535.5	− 2567	−31.5	× 55 / 330	−5.3
Sum, rounded to a whole point						−34

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,947	2395.8	− 2432	−36.2	× 54 / 342	−5.7
4	83,950	2445.6	− 2473	−27.4	× 68 / 342	−5.4
5	83,951	2486.6	− 2502	−15.4	× 52 / 342	−2.3
6	83,954	2504.2	− 2531	−26.8	× 62 / 342	−4.9
7	83,955	2536.0	− 2552	−16	× 61 / 342	−2.9
8	83,958	2522.0	− 2567	−45	× 45 / 342	−5.9
Sum, rounded to a whole point						−27

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,557	2410.8	− 2432	−21.2	× 51 / 344	−3.1
4	84,558	2427.9	− 2473	−45.1	× 58 / 344	−7.6
5	84,559	2453.9	− 2502	−48.1	× 63 / 344	−8.8
6	84,560	2525.0	− 2531	−6	× 57 / 344	−1
7	84,561	2524.9	− 2552	−27.1	× 53 / 344	−4.2
8	84,562	2510.1	− 2567	−56.9	× 62 / 344	−10.3
Sum, rounded to a whole point						−35

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,728	2397.7	− 2432	−34.3	× 45 / 293	−5.3
4	84,729	2441.7	− 2473	−31.3	× 50 / 293	−5.3
5	84,730	2485.6	− 2502	−16.4	× 39 / 293	−2.2
6	84,731	2504.2	− 2531	−26.8	× 41 / 293	−3.8
7	84,732	2540.2	− 2552	−11.8	× 55 / 293	−2.2
8	84,733	2544.1	− 2567	−22.9	× 63 / 293	−4.9
Sum, rounded to a whole point						−24

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,667	2397.2	− 2432	−34.8	× 47 / 299	−5.5
4	84,668	2422.3	− 2473	−50.7	× 49 / 299	−8.3
5	84,669	2481.2	− 2502	−20.8	× 49 / 299	−3.4
6	84,670	2518.1	− 2531	−12.9	× 47 / 299	−2
7	84,671	2533.6	− 2552	−18.4	× 47 / 299	−2.9
8	84,672	2560.3	− 2567	−6.7	× 60 / 299	−1.3
Sum, rounded to a whole point						−23

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,660	2387.0	− 2432	−45	× 34 / 267	−5.7
4	84,661	2452.6	− 2473	−20.4	× 47 / 267	−3.6
5	84,662	2438.4	− 2502	−63.6	× 49 / 267	−11.7
6	84,663	2494.0	− 2531	−37	× 51 / 267	−7.1
7	84,664	2532.0	− 2552	−20	× 44 / 267	−3.3
8	84,665	2555.2	− 2567	−11.8	× 42 / 267	−1.9
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	84,354	2379.7	− 2432	−52.3	× 38 / 259	−7.7
4	84,355	2442.3	− 2473	−30.7	× 35 / 259	−4.1
5	84,356	2424.2	− 2502	−77.8	× 51 / 259	−15.3
6	84,357	2486.5	− 2531	−44.5	× 46 / 259	−7.9
7	84,358	2500.8	− 2552	−51.2	× 47 / 259	−9.3
8	84,359	2542.7	− 2567	−24.3	× 42 / 259	−3.9
Sum, rounded to a whole point						−48

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −31, −33, −34, −27, −35, −24, −23, −33, −48 → −32
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 2 · 2016→2017: 1 · 2017→2018: 7 · 2018→2019: 8 · 2019→2022: 11 · 2022→2023: 1 · 2023→2024: 10 · 2024→2025: 15 → average 6.9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.9 × 2.66 = 18.4. Upper limit −13.6, lower limit −50.4.

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 — 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.

Schools in Luther Burbank

Luther Burbank Elementary