Conejo Middle: 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
6	11,553	2452.0	− 2552	−100	× 51 / 159	−32.1
7	11,555	2501.1	− 2567	−65.9	× 49 / 159	−20.3
8	11,557	2492.8	− 2586	−93.2	× 59 / 159	−34.6
Sum, rounded to a whole point						−87

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	10,563	2477.1	− 2552	−74.9	× 46 / 150	−23
7	10,565	2516.7	− 2567	−50.3	× 54 / 150	−18.1
8	10,566	2529.7	− 2586	−56.3	× 50 / 150	−18.8
Sum, rounded to a whole point						−60

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	10,894	2468.1	− 2552	−83.9	× 57 / 154	−31.1
7	10,897	2482.4	− 2567	−84.6	× 46 / 154	−25.3
8	10,898	2485.9	− 2586	−100.1	× 51 / 154	−33.2
Sum, rounded to a whole point						−89

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	10,901	2459.1	− 2552	−92.9	× 43 / 140	−28.5
7	10,902	2472.3	− 2567	−94.7	× 48 / 140	−32.5
8	10,905	2422.6	− 2586	−163.4	× 49 / 140	−57.2
Sum, rounded to a whole point						−118

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	10,978	2489.0	− 2552	−63	× 46 / 131	−22.1
7	10,979	2510.8	− 2567	−56.2	× 38 / 131	−16.3
8	10,980	2491.0	− 2586	−95	× 47 / 131	−34.1
Sum, rounded to a whole point						−73

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	10,842	2394.4	− 2552	−157.6	× 49 / 144	−53.6
7	10,843	2416.8	− 2567	−150.2	× 53 / 144	−55.3
8	10,844	2457.5	− 2586	−128.5	× 42 / 144	−37.5
Sum, rounded to a whole point						−146

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	10,997	2406.4	− 2552	−145.6	× 48 / 151	−46.3
7	10,998	2435.2	− 2567	−131.8	× 50 / 151	−43.6
8	10,999	2380.7	− 2586	−205.3	× 53 / 151	−72.1
Sum, rounded to a whole point						−162

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	10,979	2451.7	− 2552	−100.3	× 60 / 161	−37.4
7	10,980	2437.7	− 2567	−129.3	× 51 / 161	−41
8	10,981	2431.5	− 2586	−154.5	× 50 / 161	−48
Sum, rounded to a whole point						−126

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	10,939	2480.3	− 2552	−71.7	× 49 / 159	−22.1
7	10,940	2472.2	− 2567	−94.8	× 63 / 159	−37.6
8	10,941	2447.2	− 2586	−138.8	× 47 / 159	−41
Sum, rounded to a whole point						−101

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	10,912	2447.0	− 2552	−105	× 41 / 146	−29.5
7	10,913	2489.2	− 2567	−77.8	× 45 / 146	−24
8	10,914	2436.9	− 2586	−149.1	× 60 / 146	−61.3
Sum, rounded to a whole point						−115

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −87, −60, −89, −118, −73, −146, −162, −126, −101, −115 → −107.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 27 · 2016→2017: 29 · 2017→2018: 29 · 2018→2019: 45 · 2019→2021: 73 · 2021→2022: 16 · 2022→2023: 36 · 2023→2024: 25 · 2024→2025: 14 → average 32.7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 32.7 × 2.66 = 87. Upper limit −20.7, lower limit −194.7.

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.