Marianna Avenue 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	31,139	2387.0	− 2432	−45	× 67 / 221	−13.6
4	31,141	2437.3	− 2473	−35.7	× 51 / 221	−8.2
5	31,143	2469.7	− 2502	−32.3	× 51 / 221	−7.5
6	31,145	2507.5	− 2531	−23.5	× 52 / 221	−5.5
Sum, rounded to a whole point						−35

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	29,358	2390.7	− 2432	−41.3	× 45 / 204	−9.1
4	29,360	2471.3	− 2473	−1.7	× 63 / 204	−0.5
5	29,362	2494.4	− 2502	−7.6	× 46 / 204	−1.7
6	29,364	2530.4	− 2531	−0.6	× 50 / 204	−0.1
Sum, rounded to a whole point						−11

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	29,922	2418.5	− 2432	−13.5	× 36 / 184	−2.6
4	29,924	2449.7	− 2473	−23.3	× 46 / 184	−5.8
5	29,926	2501.8	− 2502	−0.2	× 56 / 184	−0.1
6	29,929	2538.8	− 2531	7.8	× 46 / 184	2
Sum, rounded to a whole point						−7

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	29,972	2408.1	− 2432	−23.9	× 46 / 192	−5.7
4	29,974	2496.1	− 2473	23.1	× 40 / 192	4.8
5	29,976	2481.4	− 2502	−20.6	× 46 / 192	−4.9
6	29,978	2547.8	− 2531	16.8	× 60 / 192	5.3
Sum, rounded to a whole point						−1

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	30,141	2385.0	− 2432	−47	× 45 / 174	−12.2
4	30,142	2465.9	− 2473	−7.1	× 45 / 174	−1.8
5	30,143	2519.0	− 2502	17	× 40 / 174	3.9
6	30,144	2541.8	− 2531	10.8	× 44 / 174	2.7
Sum, rounded to a whole point						−7

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	30,172	2350.5	− 2432	−81.5	× 35 / 140	−20.4
4	30,173	2458.7	− 2473	−14.3	× 44 / 140	−4.5
5	30,174	2493.9	− 2502	−8.1	× 28 / 140	−1.6
6	30,175	2547.3	− 2531	16.3	× 33 / 140	3.8
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	30,229	2377.3	− 2432	−54.7	× 33 / 139	−13
4	30,230	2419.9	− 2473	−53.1	× 34 / 139	−13
5	30,231	2510.4	− 2502	8.4	× 47 / 139	2.8
6	30,232	2529.8	− 2531	−1.2	× 25 / 139	−0.2
Sum, rounded to a whole point						−23

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	30,095	2373.0	− 2432	−59	× 37 / 145	−15.1
4	30,096	2438.0	− 2473	−35	× 36 / 145	−8.7
5	30,097	2472.5	− 2502	−29.5	× 28 / 145	−5.7
6	30,098	2550.9	− 2531	19.9	× 44 / 145	6
Sum, rounded to a whole point						−23

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	29,956	2390.3	− 2432	−41.7	× 34 / 137	−10.3
4	29,957	2431.2	− 2473	−41.8	× 40 / 137	−12.2
5	29,958	2484.9	− 2502	−17.1	× 37 / 137	−4.6
6	29,959	2514.0	− 2531	−17	× 26 / 137	−3.2
Sum, rounded to a whole point						−30

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −35, −11, −7, −1, −7, −23, −23, −23, −30 → −17.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 24 · 2016→2017: 4 · 2017→2018: 6 · 2018→2019: 6 · 2019→2022: 16 · 2022→2023: 0 · 2023→2024: 0 · 2024→2025: 7 → average 7.9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7.9 × 2.66 = 21. Upper limit 3.2, lower limit −38.8.

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.