Barbara Comstock Morse 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.

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	60,431	2406.1	− 2432	−25.9	× 118 / 447	−6.8
4	60,433	2423.9	− 2473	−49.1	× 99 / 447	−10.9
5	60,435	2465.1	− 2502	−36.9	× 103 / 447	−8.5
6	60,437	2503.7	− 2531	−27.3	× 127 / 447	−7.8
Sum, rounded to a whole point						−34

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	56,128	2406.6	− 2432	−25.4	× 101 / 405	−6.3
4	56,129	2462.7	− 2473	−10.3	× 110 / 405	−2.8
5	56,131	2460.1	− 2502	−41.9	× 92 / 405	−9.5
6	56,133	2523.2	− 2531	−7.8	× 102 / 405	−2
Sum, rounded to a whole point						−21

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,760	2395.1	− 2432	−36.9	× 121 / 428	−10.4
4	57,763	2456.7	− 2473	−16.3	× 106 / 428	−4
5	57,765	2476.7	− 2502	−25.3	× 112 / 428	−6.6
6	57,766	2508.5	− 2531	−22.5	× 89 / 428	−4.7
Sum, rounded to a whole point						−26

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,896	2425.1	− 2432	−6.9	× 102 / 429	−1.6
4	57,897	2449.1	− 2473	−23.9	× 114 / 429	−6.4
5	57,900	2476.6	− 2502	−25.4	× 100 / 429	−5.9
6	57,901	2527.9	− 2531	−3.1	× 113 / 429	−0.8
Sum, rounded to a whole point						−15

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,146	2421.3	− 2432	−10.7	× 95 / 434	−2.3
4	58,147	2455.1	− 2473	−17.9	× 116 / 434	−4.8
5	58,148	2485.5	− 2502	−16.5	× 114 / 434	−4.3
6	58,149	2547.0	− 2531	16	× 109 / 434	4
Sum, rounded to a whole point						−7

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	56,833	2371.3	− 2432	−60.7	× 79 / 328	−14.6
4	56,834	2438.9	− 2473	−34.1	× 84 / 328	−8.7
5	56,835	2491.2	− 2502	−10.8	× 81 / 328	−2.7
6	56,836	2502.4	− 2531	−28.6	× 84 / 328	−7.3
Sum, rounded to a whole point						−33

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,187	2410.9	− 2432	−21.1	× 115 / 390	−6.2
4	58,188	2445.3	− 2473	−27.7	× 80 / 390	−5.7
5	58,189	2480.9	− 2502	−21.1	× 102 / 390	−5.5
6	58,190	2509.4	− 2531	−21.6	× 93 / 390	−5.2
Sum, rounded to a whole point						−23

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,161	2392.0	− 2432	−40	× 98 / 401	−9.8
4	58,162	2462.3	− 2473	−10.7	× 109 / 401	−2.9
5	58,163	2463.4	− 2502	−38.6	× 87 / 401	−8.4
6	58,164	2514.7	− 2531	−16.3	× 107 / 401	−4.3
Sum, rounded to a whole point						−25

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,058	2402.3	− 2432	−29.7	× 101 / 393	−7.6
4	58,059	2464.3	− 2473	−8.7	× 95 / 393	−2.1
5	58,060	2493.2	− 2502	−8.8	× 110 / 393	−2.5
6	58,061	2501.0	− 2531	−30	× 87 / 393	−6.6
Sum, rounded to a whole point						−19

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,817	2392.5	− 2432	−39.5	× 95 / 415	−9
4	57,818	2475.2	− 2473	2.2	× 105 / 415	0.6
5	57,819	2478.2	− 2502	−23.8	× 106 / 415	−6.1
6	57,820	2535.6	− 2531	4.6	× 109 / 415	1.2
Sum, rounded to a whole point						−13

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −34, −21, −26, −15, −7, −33, −23, −25, −19, −13 → −21.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 13 · 2016→2017: 5 · 2017→2018: 11 · 2018→2019: 8 · 2019→2021: 26 · 2021→2022: 10 · 2022→2023: 2 · 2023→2024: 6 · 2024→2025: 6 → average 9.7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.7 × 2.66 = 25.8. Upper limit 4.2, lower limit −47.4.

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.