Hagginwood 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	63,317	2358.4	− 2436	−77.6	× 65 / 256	−19.7
4	63,318	2408.2	− 2485	−76.8	× 61 / 256	−18.3
5	63,321	2430.6	− 2528	−97.4	× 62 / 256	−23.6
6	63,322	2446.8	− 2552	−105.2	× 68 / 256	−27.9
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	58,734	2380.8	− 2436	−55.2	× 59 / 233	−14
4	58,735	2417.9	− 2485	−67.1	× 65 / 233	−18.7
5	58,737	2444.3	− 2528	−83.7	× 56 / 233	−20.1
6	58,739	2454.4	− 2552	−97.6	× 53 / 233	−22.2
Sum, rounded to a whole point						−75

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,446	2365.6	− 2436	−70.4	× 54 / 229	−16.6
4	60,448	2416.7	− 2485	−68.3	× 62 / 229	−18.5
5	60,450	2428.5	− 2528	−99.5	× 58 / 229	−25.2
6	60,452	2412.5	− 2552	−139.5	× 55 / 229	−33.5
Sum, rounded to a whole point						−94

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,571	2387.0	− 2436	−49	× 67 / 242	−13.6
4	60,574	2427.3	− 2485	−57.7	× 55 / 242	−13.1
5	60,575	2439.6	− 2528	−88.4	× 57 / 242	−20.8
6	60,578	2446.8	− 2552	−105.2	× 63 / 242	−27.4
Sum, rounded to a whole point						−75

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,823	2380.4	− 2436	−55.6	× 56 / 199	−15.6
4	60,824	2450.4	− 2485	−34.6	× 52 / 199	−9
5	60,825	2445.2	− 2528	−82.8	× 48 / 199	−20
6	60,826	2460.3	− 2552	−91.7	× 43 / 199	−19.8
Sum, rounded to a whole point						−64

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,921	2371.6	− 2436	−64.4	× 46 / 211	−14
4	60,922	2367.3	− 2485	−117.7	× 63 / 211	−35.1
5	60,923	2403.5	− 2528	−124.5	× 49 / 211	−28.9
6	60,924	2409.6	− 2552	−142.4	× 53 / 211	−35.8
Sum, rounded to a whole point						−114

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,868	2344.5	− 2436	−91.5	× 48 / 212	−20.7
4	60,869	2414.4	− 2485	−70.6	× 53 / 212	−17.7
5	60,870	2417.7	− 2528	−110.3	× 62 / 212	−32.3
6	60,871	2419.1	− 2552	−132.9	× 49 / 212	−30.7
Sum, rounded to a whole point						−101

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,813	2364.2	− 2436	−71.8	× 50 / 198	−18.1
4	60,814	2393.6	− 2485	−91.4	× 46 / 198	−21.2
5	60,815	2442.6	− 2528	−85.4	× 46 / 198	−19.8
6	60,816	2422.0	− 2552	−130	× 56 / 198	−36.8
Sum, rounded to a whole point						−96

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,582	2389.7	− 2436	−46.3	× 63 / 198	−14.7
4	60,583	2402.2	− 2485	−82.8	× 44 / 198	−18.4
5	60,584	2413.2	− 2528	−114.8	× 45 / 198	−26.1
6	60,585	2471.9	− 2552	−80.1	× 46 / 198	−18.6
Sum, rounded to a whole point						−78

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −90, −75, −94, −75, −64, −114, −101, −96, −78 → −87.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 15 · 2016→2017: 19 · 2017→2018: 19 · 2018→2019: 11 · 2019→2022: 50 · 2022→2023: 13 · 2023→2024: 5 · 2024→2025: 18 → average 18.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 18.8 × 2.66 = 50. Upper limit −37.4, lower limit −137.4.

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.