Mary Tsukamoto 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	60,396	2385.3	− 2432	−46.7	× 131 / 554	−11
4	60,398	2462.9	− 2473	−10.1	× 140 / 554	−2.6
5	60,400	2471.8	− 2502	−30.2	× 139 / 554	−7.6
6	60,402	2518.6	− 2531	−12.4	× 144 / 554	−3.2
Sum, rounded to a whole point						−24

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	56,093	2394.5	− 2432	−37.5	× 140 / 576	−9.1
4	56,096	2447.5	− 2473	−25.5	× 140 / 576	−6.2
5	56,097	2512.2	− 2502	10.2	× 146 / 576	2.6
6	56,100	2516.7	− 2531	−14.3	× 150 / 576	−3.7
Sum, rounded to a whole point						−16

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,726	2415.8	− 2432	−16.2	× 131 / 555	−3.8
4	57,728	2442.5	− 2473	−30.5	× 141 / 555	−7.7
5	57,730	2480.5	− 2502	−21.5	× 142 / 555	−5.5
6	57,733	2541.2	− 2531	10.2	× 141 / 555	2.6
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
3	57,862	2424.2	− 2432	−7.8	× 128 / 549	−1.8
4	57,863	2468.3	− 2473	−4.7	× 142 / 549	−1.2
5	57,866	2474.0	− 2502	−28	× 138 / 549	−7
6	57,867	2525.0	− 2531	−6	× 141 / 549	−1.5
Sum, rounded to a whole point						−12

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,112	2419.4	− 2432	−12.6	× 122 / 542	−2.8
4	58,113	2458.7	− 2473	−14.3	× 143 / 542	−3.8
5	58,114	2516.7	− 2502	14.7	× 136 / 542	3.7
6	58,115	2503.6	− 2531	−27.4	× 141 / 542	−7.1
Sum, rounded to a whole point						−10

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	56,799	2403.6	− 2432	−28.4	× 117 / 541	−6.1
4	56,800	2429.7	− 2473	−43.3	× 147 / 541	−11.8
5	56,801	2477.0	− 2502	−25	× 138 / 541	−6.4
6	56,802	2497.0	− 2531	−34	× 139 / 541	−8.7
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	58,153	2426.1	− 2432	−5.9	× 141 / 557	−1.5
4	58,154	2456.8	− 2473	−16.2	× 123 / 557	−3.6
5	58,155	2472.7	− 2502	−29.3	× 152 / 557	−8
6	58,156	2519.7	− 2531	−11.3	× 141 / 557	−2.9
Sum, rounded to a whole point						−16

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,127	2421.1	− 2432	−10.9	× 119 / 538	−2.4
4	58,128	2468.4	− 2473	−4.6	× 142 / 538	−1.2
5	58,129	2483.9	− 2502	−18.1	× 124 / 538	−4.2
6	58,130	2502.1	− 2531	−28.9	× 153 / 538	−8.2
Sum, rounded to a whole point						−16

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	58,024	2422.9	− 2432	−9.1	× 154 / 558	−2.5
4	58,025	2463.1	− 2473	−9.9	× 126 / 558	−2.2
5	58,026	2504.8	− 2502	2.8	× 147 / 558	0.7
6	58,027	2534.7	− 2531	3.7	× 131 / 558	0.9
Sum, rounded to a whole point						−3

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,783	2432.6	− 2432	0.6	× 144 / 582	0.1
4	57,784	2474.7	− 2473	1.7	× 167 / 582	0.5
5	57,785	2495.3	− 2502	−6.7	× 127 / 582	−1.5
6	57,786	2542.5	− 2531	11.5	× 144 / 582	2.8
Sum, rounded to a whole point						2

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −24, −16, −14, −12, −10, −33, −16, −16, −3, 2 → −14.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 8 · 2016→2017: 2 · 2017→2018: 2 · 2018→2019: 2 · 2019→2021: 23 · 2021→2022: 17 · 2022→2023: 0 · 2023→2024: 13 · 2024→2025: 5 → average 8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8 × 2.66 = 21.3. Upper limit 7.1, lower limit −35.5.

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.