Arthur F. Corey 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 scores just under the grade 3 bar. 2427 vs. 2432.
4th The average 4th grader scores 22 points under the grade 4 bar. 2451 vs. 2473.
5th The average 5th grader meets the grade 5 bar. 2534 vs. 2502.

2026 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	48,318	2409.2	− 2432	−22.8	× 98 / 312	−7.2
4	48,321	2438.6	− 2473	−34.4	× 71 / 312	−7.8
5	48,322	2498.0	− 2502	−4	× 64 / 312	−0.8
6	48,325	2518.9	− 2531	−12.1	× 79 / 312	−3.1
Sum, rounded to a whole point						−19

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	44,934	2442.9	− 2432	10.9	× 88 / 322	3
4	44,936	2462.4	− 2473	−10.6	× 101 / 322	−3.3
5	44,937	2502.7	− 2502	0.7	× 68 / 322	0.1
6	44,939	2541.3	− 2531	10.3	× 65 / 322	2.1
Sum, rounded to a whole point						2

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,139	2445.5	− 2432	13.5	× 71 / 321	3
4	46,142	2493.0	− 2473	20	× 85 / 321	5.3
5	46,144	2477.2	− 2502	−24.8	× 99 / 321	−7.6
6	46,145	2520.6	− 2531	−10.4	× 66 / 321	−2.1
Sum, rounded to a whole point						−2

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,147	2460.0	− 2432	28	× 73 / 305	6.7
4	46,149	2439.3	− 2473	−33.7	× 64 / 305	−7.1
5	46,152	2532.4	− 2502	30.4	× 78 / 305	7.8
6	46,153	2503.8	− 2531	−27.2	× 90 / 305	−8
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	46,320	2427.3	− 2432	−4.7	× 80 / 298	−1.3
4	46,321	2467.0	− 2473	−6	× 75 / 298	−1.5
5	46,322	2483.3	− 2502	−18.7	× 65 / 298	−4.1
6	46,323	2536.3	− 2531	5.3	× 78 / 298	1.4
Sum, rounded to a whole point						−5

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,152	2431.2	− 2432	−0.8	× 70 / 201	−0.3
4	46,153	2459.3	− 2473	−13.7	× 70 / 201	−4.8
5	46,154	2490.2	− 2502	−11.8	× 61 / 201	−3.6
Sum, rounded to a whole point						−9

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	46,138	2406.2	− 2432	−25.8	× 74 / 211	−9
4	46,139	2446.9	− 2473	−26.1	× 69 / 211	−8.5
5	46,140	2492.9	− 2502	−9.1	× 68 / 211	−2.9
Sum, rounded to a whole point						−21

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,997	2466.4	− 2432	34.4	× 54 / 199	9.3
4	45,998	2454.9	− 2473	−18.1	× 73 / 199	−6.6
5	45,999	2500.8	− 2502	−1.2	× 72 / 199	−0.4
Sum, rounded to a whole point						2

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,753	2435.6	− 2432	3.6	× 51 / 171	1.1
4	45,754	2486.9	− 2473	13.9	× 53 / 171	4.3
5	45,755	2500.2	− 2502	−1.8	× 67 / 171	−0.7
Sum, rounded to a whole point						5

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,643	2427.2	− 2432	−4.8	× 48 / 154	−1.5
4	45,644	2451.1	− 2473	−21.9	× 50 / 154	−7.1
5	45,645	2534.2	− 2502	32.2	× 56 / 154	11.7
Sum, rounded to a whole point						3

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −19, 2, −2, −1, −5, −9, −21, 2, 5, 3 → −4.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 21 · 2016→2017: 4 · 2017→2018: 1 · 2018→2019: 4 · 2019→2022: 4 · 2022→2023: 12 · 2023→2024: 23 · 2024→2025: 3 · 2025→2026: 2 → average 8.2
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8.2 × 2.66 = 21.8. Upper limit 17.3, lower limit −26.3.

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.