Bixby 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.

Measured against the grade bars

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

3rd The average 3rd grader meets the grade 3 bar. 2456 vs. 2432.
4th The average 4th grader scores just under the grade 4 bar. 2466 vs. 2473.
5th The average 5th grader scores just under the grade 5 bar. 2502 vs. 2502.

2024 results. The English test covers reading, writing, listening and research together. "Meets standard" is the state's mark for being on track for that grade.

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	39,412	2418.7	− 2432	−13.3	× 46 / 141	−4.3
4	39,413	2419.3	− 2473	−53.7	× 41 / 141	−15.6
5	39,416	2444.7	− 2502	−57.3	× 54 / 141	−21.9
Sum, rounded to a whole point						−42

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,518	2411.3	− 2432	−20.7	× 42 / 139	−6.3
4	36,520	2462.8	− 2473	−10.2	× 52 / 139	−3.8
5	36,522	2463.2	− 2502	−38.8	× 45 / 139	−12.6
Sum, rounded to a whole point						−23

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,285	2413.8	− 2432	−18.2	× 46 / 136	−6.2
4	37,286	2512.1	− 2473	39.1	× 37 / 136	10.6
5	37,288	2487.2	− 2502	−14.8	× 53 / 136	−5.8
Sum, rounded to a whole point						−1

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,238	2426.0	− 2432	−6	× 36 / 126	−1.7
4	37,240	2476.0	− 2473	3	× 48 / 126	1.1
5	37,242	2507.7	− 2502	5.7	× 42 / 126	1.9
Sum, rounded to a whole point						1

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,437	2457.2	− 2432	25.2	× 42 / 131	8.1
4	37,438	2445.7	− 2473	−27.3	× 38 / 131	−7.9
5	37,439	2507.7	− 2502	5.7	× 51 / 131	2.2
Sum, rounded to a whole point						2

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,344	2457.1	− 2432	25.1	× 39 / 123	8
4	37,345	2501.1	− 2473	28.1	× 34 / 123	7.8
5	37,346	2524.5	− 2502	22.5	× 50 / 123	9.1
Sum, rounded to a whole point						25

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,375	2439.9	− 2432	7.9	× 37 / 118	2.5
4	37,376	2474.6	− 2473	1.6	× 41 / 118	0.6
5	37,377	2501.3	− 2502	−0.7	× 40 / 118	−0.2
Sum, rounded to a whole point						3

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,227	2456.1	− 2432	24.1	× 34 / 109	7.5
4	37,228	2465.5	− 2473	−7.5	× 34 / 109	−2.3
5	37,229	2501.6	− 2502	−0.4	× 41 / 109	−0.2
Sum, rounded to a whole point						5

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −42, −23, −1, 1, 2, 25, 3, 5 → −3.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 19 · 2016→2017: 22 · 2017→2018: 2 · 2018→2019: 1 · 2019→2022: 23 · 2022→2023: 22 · 2023→2024: 2 → average 13
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 13 × 2.66 = 34.6. Upper limit 30.8, lower limit −38.4.

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.