La Honda Steam Academy: 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	85,112	2382.4	− 2436	−53.6	× 57 / 272	−11.2
4	85,113	2399.1	− 2485	−85.9	× 79 / 272	−24.9
5	85,116	2426.3	− 2528	−101.7	× 63 / 272	−23.6
6	85,117	2438.5	− 2552	−113.5	× 73 / 272	−30.5
Sum, rounded to a whole point						−90

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	78,938	2400.1	− 2436	−35.9	× 74 / 281	−9.5
4	78,941	2397.8	− 2485	−87.2	× 66 / 281	−20.5
5	78,943	2425.4	− 2528	−102.6	× 78 / 281	−28.5
6	78,945	2461.2	− 2552	−90.8	× 63 / 281	−20.4
Sum, rounded to a whole point						−79

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,096	2397.6	− 2436	−38.4	× 77 / 294	−10.1
4	81,097	2392.6	− 2485	−92.4	× 74 / 294	−23.3
5	81,099	2436.1	− 2528	−91.9	× 64 / 294	−20
6	81,102	2479.3	− 2552	−72.7	× 79 / 294	−19.5
Sum, rounded to a whole point						−73

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,245	2405.3	− 2436	−30.7	× 72 / 289	−7.6
4	81,246	2404.6	− 2485	−80.4	× 72 / 289	−20
5	81,249	2413.4	− 2528	−114.6	× 75 / 289	−29.7
6	81,250	2433.8	− 2552	−118.2	× 70 / 289	−28.6
Sum, rounded to a whole point						−86

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,778	2415.3	− 2436	−20.7	× 71 / 287	−5.1
4	81,779	2408.9	− 2485	−76.1	× 68 / 287	−18
5	81,780	2431.1	− 2528	−96.9	× 67 / 287	−22.6
6	81,781	2448.0	− 2552	−104	× 81 / 287	−29.4
Sum, rounded to a whole point						−75

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,999	2365.5	− 2436	−70.5	× 70 / 265	−18.6
4	82,000	2379.4	− 2485	−105.6	× 58 / 265	−23.1
5	82,001	2394.5	− 2528	−133.5	× 69 / 265	−34.8
6	82,002	2428.9	− 2552	−123.1	× 68 / 265	−31.6
Sum, rounded to a whole point						−108

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,959	2384.8	− 2436	−51.2	× 84 / 278	−15.5
4	81,960	2398.6	− 2485	−86.4	× 71 / 278	−22.1
5	81,961	2397.0	− 2528	−131	× 55 / 278	−25.9
6	81,962	2456.2	− 2552	−95.8	× 68 / 278	−23.4
Sum, rounded to a whole point						−87

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,971	2374.8	− 2436	−61.2	× 61 / 276	−13.5
4	81,972	2405.6	− 2485	−79.4	× 86 / 276	−24.7
5	81,973	2400.3	− 2528	−127.7	× 73 / 276	−33.8
6	81,974	2443.1	− 2552	−108.9	× 56 / 276	−22.1
Sum, rounded to a whole point						−94

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,643	2387.2	− 2436	−48.8	× 48 / 263	−8.9
4	81,644	2405.0	− 2485	−80	× 61 / 263	−18.6
5	81,645	2423.2	− 2528	−104.8	× 89 / 263	−35.5
6	81,646	2398.7	− 2552	−153.3	× 65 / 263	−37.9
Sum, rounded to a whole point						−101

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −90, −79, −73, −86, −75, −108, −87, −94, −101 → −88.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 11 · 2016→2017: 6 · 2017→2018: 13 · 2018→2019: 11 · 2019→2022: 33 · 2022→2023: 21 · 2023→2024: 7 · 2024→2025: 7 → average 13.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 13.6 × 2.66 = 36.2. Upper limit −51.9, lower limit −124.3.

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.