Mary Collins Charter School At Cherry Valley: 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.

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	94,803	2410.5	− 2432	−21.5	× 50 / 286	−3.8
4	94,804	2464.2	− 2473	−8.8	× 55 / 286	−1.7
5	94,807	2514.9	− 2502	12.9	× 46 / 286	2.1
6	94,809	2544.7	− 2531	13.7	× 55 / 286	2.6
7	94,810	2594.4	− 2552	42.4	× 34 / 286	5
8	94,813	2573.0	− 2567	6	× 46 / 286	1
Sum, rounded to a whole point						5

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	88,053	2428.0	− 2432	−4	× 46 / 251	−0.7
4	88,055	2451.9	− 2473	−21.1	× 47 / 251	−4
5	88,057	2503.2	− 2502	1.2	× 56 / 251	0.3
6	88,059	2564.3	− 2531	33.3	× 39 / 251	5.2
7	88,061	2545.6	− 2552	−6.4	× 30 / 251	−0.8
8	88,063	2605.9	− 2567	38.9	× 33 / 251	5.1
Sum, rounded to a whole point						5

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,602	2427.4	− 2432	−4.6	× 53 / 257	−0.9
4	90,605	2468.6	− 2473	−4.4	× 42 / 257	−0.7
5	90,607	2496.1	− 2502	−5.9	× 50 / 257	−1.1
6	90,609	2535.8	− 2531	4.8	× 52 / 257	1
7	90,611	2545.4	− 2552	−6.6	× 31 / 257	−0.8
8	90,612	2568.7	− 2567	1.7	× 29 / 257	0.2
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	90,807	2406.4	− 2432	−25.6	× 37 / 242	−3.9
4	90,810	2469.0	− 2473	−4	× 46 / 242	−0.8
5	90,811	2508.0	− 2502	6	× 41 / 242	1
6	90,814	2552.5	− 2531	21.5	× 49 / 242	4.4
7	90,815	2578.8	− 2552	26.8	× 41 / 242	4.5
8	90,818	2586.9	− 2567	19.9	× 28 / 242	2.3
Sum, rounded to a whole point						8

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,443	2399.4	− 2432	−32.6	× 39 / 252	−5
4	91,444	2466.9	− 2473	−6.1	× 40 / 252	−1
5	91,445	2530.4	− 2502	28.4	× 51 / 252	5.7
6	91,446	2552.3	− 2531	21.3	× 43 / 252	3.6
7	91,447	2588.1	− 2552	36.1	× 40 / 252	5.7
8	91,448	2613.7	− 2567	46.7	× 39 / 252	7.2
Sum, rounded to a whole point						16

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	89,480	2511.8	− 2531	−19.2	× 43 / 124	−6.7
7	89,481	2576.7	− 2552	24.7	× 39 / 124	7.8
8	89,482	2620.2	− 2567	53.2	× 42 / 124	18
Sum, rounded to a whole point						19

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,685	2427.3	− 2432	−4.7	× 51 / 276	−0.9
4	91,686	2483.6	− 2473	10.6	× 39 / 276	1.5
5	91,687	2528.1	− 2502	26.1	× 49 / 276	4.6
6	91,688	2534.7	− 2531	3.7	× 45 / 276	0.6
7	91,689	2559.7	− 2552	7.7	× 48 / 276	1.3
8	91,690	2594.2	− 2567	27.2	× 44 / 276	4.3
Sum, rounded to a whole point						12

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,579	2414.9	− 2432	−17.1	× 50 / 280	−3.1
4	91,580	2503.0	− 2473	30	× 49 / 280	5.3
5	91,581	2520.9	− 2502	18.9	× 42 / 280	2.8
6	91,582	2554.0	− 2531	23	× 49 / 280	4
7	91,583	2565.2	− 2552	13.2	× 45 / 280	2.1
8	91,584	2572.3	− 2567	5.3	× 45 / 280	0.9
Sum, rounded to a whole point						12

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,522	2418.7	− 2432	−13.3	× 46 / 307	−2
4	91,523	2496.0	− 2473	23	× 64 / 307	4.8
5	91,524	2532.3	− 2502	30.3	× 61 / 307	6
6	91,525	2534.7	− 2531	3.7	× 42 / 307	0.5
7	91,526	2590.9	− 2552	38.9	× 50 / 307	6.3
8	91,527	2581.5	− 2567	14.5	× 44 / 307	2.1
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	91,226	2438.6	− 2432	6.6	× 54 / 325	1.1
4	91,227	2474.5	− 2473	1.5	× 53 / 325	0.2
5	91,228	2541.7	− 2502	39.7	× 65 / 325	7.9
6	91,229	2548.4	− 2531	17.4	× 63 / 325	3.4
7	91,230	2574.7	− 2552	22.7	× 41 / 325	2.9
8	91,231	2608.3	− 2567	41.3	× 49 / 325	6.2
Sum, rounded to a whole point						22

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 5, 5, −2, 8, 16, 19, 12, 12, 18, 22 → 11.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 0 · 2016→2017: 7 · 2017→2018: 10 · 2018→2019: 8 · 2019→2021: 3 · 2021→2022: 7 · 2022→2023: 0 · 2023→2024: 6 · 2024→2025: 4 → average 5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 5 × 2.66 = 13.3. Upper limit 24.8, lower limit −1.8.

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.