Mt. Woodson Elementary: math

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	73,335	2406.1	− 2436	−29.9	× 82 / 277	−8.9
4	73,337	2459.3	− 2485	−25.7	× 66 / 277	−6.1
5	73,339	2507.0	− 2528	−21	× 65 / 277	−4.9
6	73,341	2516.1	− 2552	−35.9	× 64 / 277	−8.3
Sum, rounded to a whole point						−28

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	68,025	2411.2	− 2436	−24.8	× 73 / 289	−6.3
4	68,026	2443.3	− 2485	−41.7	× 81 / 289	−11.7
5	68,028	2502.5	− 2528	−25.5	× 66 / 289	−5.8
6	68,031	2544.0	− 2552	−8	× 69 / 289	−1.9
Sum, rounded to a whole point						−26

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	69,841	2419.5	− 2436	−16.5	× 61 / 262	−3.8
4	69,844	2441.7	− 2485	−43.3	× 66 / 262	−10.9
5	69,846	2471.3	− 2528	−56.7	× 72 / 262	−15.6
6	69,848	2500.7	− 2552	−51.3	× 63 / 262	−12.3
Sum, rounded to a whole point						−43

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	69,998	2443.9	− 2436	7.9	× 60 / 253	1.9
4	70,000	2436.3	− 2485	−48.7	× 60 / 253	−11.5
5	70,002	2506.4	− 2528	−21.6	× 61 / 253	−5.2
6	70,004	2490.7	− 2552	−61.3	× 72 / 253	−17.4
Sum, rounded to a whole point						−32

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	70,517	2450.4	− 2436	14.4	× 63 / 254	3.6
4	70,518	2468.6	− 2485	−16.4	× 63 / 254	−4.1
5	70,519	2447.0	− 2528	−81	× 64 / 254	−20.4
6	70,520	2527.2	− 2552	−24.8	× 64 / 254	−6.2
Sum, rounded to a whole point						−27

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	70,609	2443.1	− 2436	7.1	× 60 / 217	2
4	70,610	2428.2	− 2485	−56.8	× 49 / 217	−12.8
5	70,611	2435.1	− 2528	−92.9	× 59 / 217	−25.3
6	70,612	2503.7	− 2552	−48.3	× 49 / 217	−10.9
Sum, rounded to a whole point						−47

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	70,615	2434.3	− 2436	−1.7	× 62 / 218	−0.5
4	70,616	2458.9	− 2485	−26.1	× 54 / 218	−6.5
5	70,617	2427.5	− 2528	−100.5	× 48 / 218	−22.1
6	70,618	2499.1	− 2552	−52.9	× 54 / 218	−13.1
Sum, rounded to a whole point						−42

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	70,597	2473.2	− 2436	37.2	× 48 / 209	8.5
4	70,598	2435.3	− 2485	−49.7	× 60 / 209	−14.3
5	70,599	2492.9	− 2528	−35.1	× 54 / 209	−9.1
6	70,600	2470.2	− 2552	−81.8	× 47 / 209	−18.4
Sum, rounded to a whole point						−33

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	70,311	2438.4	− 2436	2.4	× 44 / 194	0.5
4	70,312	2466.7	− 2485	−18.3	× 45 / 194	−4.2
5	70,313	2444.3	− 2528	−83.7	× 56 / 194	−24.2
6	70,314	2509.2	− 2552	−42.8	× 49 / 194	−10.8
Sum, rounded to a whole point						−39

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −28, −26, −43, −32, −27, −47, −42, −33, −39 → −35.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 2 · 2016→2017: 17 · 2017→2018: 11 · 2018→2019: 5 · 2019→2022: 20 · 2022→2023: 5 · 2023→2024: 9 · 2024→2025: 6 → average 9.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.4 × 2.66 = 25. Upper limit −10.2, lower limit −60.2.

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.