Roberts Ferry Charter School Academy: 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 8.

3rd The average 3rd grader meets the grade 3 bar. 2436 vs. 2432.
4th The average 4th grader meets the grade 4 bar. 2504 vs. 2473.
5th The average 5th grader meets the grade 5 bar. 2509 vs. 2502.
6th The average 6th grader scores 10 points under the grade 5 bar. 2492 vs. 2502. The 6th-grade bar is 2531.
7th The average 7th grader meets the grade 7 bar. 2576 vs. 2552.
8th The average 8th grader meets the grade 8 bar. 2591 vs. 2567.

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
8	97,454	2534.6	− 2567	−32.4	× 14 / 14	−32.4
Sum, rounded to a whole point						−32

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	90,353	2494.3	− 2531	−36.7	× 19 / 47	−14.8
7	90,354	2544.7	− 2552	−7.3	× 15 / 47	−2.3
8	90,357	2538.7	− 2567	−28.3	× 13 / 47	−7.8
Sum, rounded to a whole point						−25

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	93,004	2533.7	− 2531	2.7	× 11 / 40	0.7
7	93,006	2526.5	− 2552	−25.5	× 18 / 40	−11.5
8	93,008	2555.8	− 2567	−11.2	× 11 / 40	−3.1
Sum, rounded to a whole point						−14

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	93,207	2529.1	− 2531	−1.9	× 23 / 52	−0.8
7	93,210	2565.6	− 2552	13.6	× 12 / 52	3.1
8	93,211	2566.9	− 2567	−0.1	× 17 / 52	0
Sum, rounded to a whole point						2

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	91,873	2537.3	− 2531	6.3	× 23 / 52	2.8
7	91,874	2551.4	− 2552	−0.6	× 16 / 52	−0.2
8	91,875	2595.8	− 2567	28.8	× 13 / 52	7.2
Sum, rounded to a whole point						10

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	94,093	2521.4	− 2531	−9.6	× 18 / 44	−3.9
7	94,094	2598.6	− 2552	46.6	× 15 / 44	15.9
8	94,095	2533.8	− 2567	−33.2	× 11 / 44	−8.3
Sum, rounded to a whole point						4

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	93,999	2388.4	− 2432	−43.6	× 23 / 101	−9.9
4	94,000	2504.3	− 2473	31.3	× 23 / 101	7.1
5	94,001	2522.9	− 2502	20.9	× 20 / 101	4.1
6	94,002	2510.1	− 2531	−20.9	× 14 / 101	−2.9
7	94,003	2536.1	− 2552	−15.9	× 21 / 101	−3.3
Sum, rounded to a whole point						−5

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	93,884	2395.1	− 2432	−36.9	× 27 / 126	−7.9
4	93,885	2502.3	− 2473	29.3	× 23 / 126	5.3
5	93,886	2542.4	− 2502	40.4	× 27 / 126	8.7
6	93,887	2550.2	− 2531	19.2	× 18 / 126	2.7
7	93,888	2583.8	− 2552	31.8	× 12 / 126	3
8	93,889	2548.4	− 2567	−18.6	× 19 / 126	−2.8
Sum, rounded to a whole point						9

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	93,612	2436.0	− 2432	4	× 26 / 126	0.8
4	93,613	2499.7	− 2473	26.7	× 25 / 126	5.3
5	93,614	2528.8	− 2502	26.8	× 21 / 126	4.5
6	93,615	2556.0	− 2531	25	× 24 / 126	4.8
7	93,616	2555.5	− 2552	3.5	× 17 / 126	0.5
8	93,617	2604.6	− 2567	37.6	× 13 / 126	3.9
Sum, rounded to a whole point						20

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	93,214	2436.2	− 2432	4.2	× 20 / 131	0.6
4	93,215	2504.2	− 2473	31.2	× 27 / 131	6.4
5	93,216	2509.2	− 2502	7.2	× 22 / 131	1.2
6	93,217	2491.7	− 2531	−39.3	× 26 / 131	−7.8
7	93,218	2576.2	− 2552	24.2	× 22 / 131	4.1
8	93,219	2591.1	− 2567	24.1	× 14 / 131	2.6
Sum, rounded to a whole point						7

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −32, −25, −14, 2, 10, 4, −5, 9, 20, 7 → −2.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 7 · 2016→2017: 11 · 2017→2018: 16 · 2018→2021: 8 · 2021→2022: 6 · 2022→2023: 9 · 2023→2024: 14 · 2024→2025: 11 · 2025→2026: 13 → average 10.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.6 × 2.66 = 28.2. Upper limit 25.8, lower limit −30.6.

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.