Isleton 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 6.

3rd The average 3rd grader scores 37 points under the grade 3 bar. 2395 vs. 2432.
4th The average 4th grader scores just under the grade 4 bar. 2466 vs. 2473.
5th The average 5th grader meets the grade 5 bar. 2538 vs. 2502.
6th The average 6th grader meets the grade 6 bar. 2588 vs. 2531.

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	61,114	2434.8	− 2432	2.8	× 24 / 99	0.7
4	61,116	2405.6	− 2473	−67.4	× 20 / 99	−13.6
5	61,118	2487.5	− 2502	−14.5	× 25 / 99	−3.7
6	61,120	2496.4	− 2531	−34.6	× 30 / 99	−10.5
Sum, rounded to a whole point						−27

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	56,700	2440.3	− 2432	8.3	× 24 / 89	2.2
4	56,701	2474.6	− 2473	1.6	× 25 / 89	0.4
5	56,704	2523.0	− 2502	21	× 21 / 89	5
6	56,706	2531.5	− 2531	0.5	× 19 / 89	0.1
Sum, rounded to a whole point						8

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,348	2467.3	− 2432	35.3	× 15 / 91	5.8
4	58,351	2465.9	− 2473	−7.1	× 27 / 91	−2.1
5	58,353	2545.7	− 2502	43.7	× 27 / 91	13
6	58,354	2528.5	− 2531	−2.5	× 22 / 91	−0.6
Sum, rounded to a whole point						16

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,478	2432.4	− 2432	0.4	× 16 / 92	0.1
4	58,479	2461.7	− 2473	−11.3	× 22 / 92	−2.7
5	58,482	2537.6	− 2502	35.6	× 25 / 92	9.7
6	58,483	2598.2	− 2531	67.2	× 29 / 92	21.2
Sum, rounded to a whole point						28

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,718	2440.5	− 2432	8.5	× 20 / 90	1.9
4	58,719	2476.4	− 2473	3.4	× 22 / 90	0.8
5	58,720	2525.1	− 2502	23.1	× 18 / 90	4.6
6	58,721	2571.1	− 2531	40.1	× 30 / 90	13.4
Sum, rounded to a whole point						21

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,793	2376.0	− 2432	−56	× 23 / 92	−14
4	58,794	2472.1	− 2473	−0.9	× 22 / 92	−0.2
5	58,795	2551.4	− 2502	49.4	× 24 / 92	12.9
6	58,796	2529.5	− 2531	−1.5	× 23 / 92	−0.4
Sum, rounded to a whole point						−2

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,747	2445.7	− 2432	13.7	× 22 / 100	3
4	58,748	2409.7	− 2473	−63.3	× 27 / 100	−17.1
5	58,749	2524.6	− 2502	22.6	× 26 / 100	5.9
6	58,750	2563.7	− 2531	32.7	× 25 / 100	8.2
Sum, rounded to a whole point						0

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,664	2442.8	− 2432	10.8	× 22 / 99	2.4
4	58,665	2488.1	− 2473	15.1	× 22 / 99	3.4
5	58,666	2524.2	− 2502	22.2	× 29 / 99	6.5
6	58,667	2553.0	− 2531	22	× 26 / 99	5.8
Sum, rounded to a whole point						18

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,421	2453.3	− 2432	21.3	× 23 / 95	5.2
4	58,422	2503.3	− 2473	30.3	× 19 / 95	6.1
5	58,423	2569.3	− 2502	67.3	× 23 / 95	16.3
6	58,424	2531.7	− 2531	0.7	× 30 / 95	0.2
Sum, rounded to a whole point						28

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,338	2395.1	− 2432	−36.9	× 22 / 91	−8.9
4	58,339	2465.5	− 2473	−7.5	× 27 / 91	−2.2
5	58,340	2538.2	− 2502	36.2	× 20 / 91	8
6	58,341	2587.6	− 2531	56.6	× 22 / 91	13.7
Sum, rounded to a whole point						10

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −27, 8, 16, 28, 21, −2, 0, 18, 28, 10 → 10
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 35 · 2016→2017: 8 · 2017→2018: 12 · 2018→2019: 7 · 2019→2022: 23 · 2022→2023: 2 · 2023→2024: 18 · 2024→2025: 10 · 2025→2026: 18 → average 14.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 14.8 × 2.66 = 39.4. Upper limit 49.4, lower limit −29.4.

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.