Cedarcreek 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	37,326	2425.5	− 2436	−10.5	× 81 / 284	−3
4	37,328	2434.9	− 2485	−50.1	× 85 / 284	−15
5	37,330	2479.1	− 2528	−48.9	× 55 / 284	−9.5
6	37,332	2503.7	− 2552	−48.3	× 63 / 284	−10.7
Sum, rounded to a whole point						−38

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	34,723	2423.8	− 2436	−12.2	× 84 / 299	−3.4
4	34,725	2454.3	− 2485	−30.7	× 79 / 299	−8.1
5	34,726	2475.7	− 2528	−52.3	× 80 / 299	−14
6	34,729	2554.1	− 2552	2.1	× 56 / 299	0.4
Sum, rounded to a whole point						−25

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,368	2384.0	− 2436	−52	× 53 / 290	−9.5
4	35,371	2443.2	− 2485	−41.8	× 83 / 290	−12
5	35,373	2474.2	− 2528	−53.8	× 75 / 290	−13.9
6	35,374	2516.5	− 2552	−35.5	× 79 / 290	−9.7
Sum, rounded to a whole point						−45

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,378	2379.5	− 2436	−56.5	× 55 / 277	−11.2
4	35,380	2448.4	− 2485	−36.6	× 61 / 277	−8.1
5	35,382	2480.0	− 2528	−48	× 80 / 277	−13.9
6	35,384	2515.6	− 2552	−36.4	× 81 / 277	−10.6
Sum, rounded to a whole point						−44

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,546	2434.8	− 2436	−1.2	× 66 / 255	−0.3
4	35,547	2469.1	− 2485	−15.9	× 51 / 255	−3.2
5	35,548	2491.1	− 2528	−36.9	× 57 / 255	−8.2
6	35,549	2554.5	− 2552	2.5	× 81 / 255	0.8
Sum, rounded to a whole point						−11

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,435	2438.9	− 2436	2.9	× 40 / 210	0.6
4	35,436	2493.8	− 2485	8.8	× 54 / 210	2.3
5	35,437	2491.8	− 2528	−36.2	× 57 / 210	−9.8
6	35,438	2547.4	− 2552	−4.6	× 59 / 210	−1.3
Sum, rounded to a whole point						−8

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,440	2409.9	− 2436	−26.1	× 48 / 213	−5.9
4	35,441	2497.2	− 2485	12.2	× 45 / 213	2.6
5	35,442	2487.3	− 2528	−40.7	× 58 / 213	−11.1
6	35,443	2519.5	− 2552	−32.5	× 62 / 213	−9.5
Sum, rounded to a whole point						−24

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,302	2454.0	− 2436	18	× 55 / 213	4.6
4	35,303	2450.3	− 2485	−34.7	× 50 / 213	−8.1
5	35,304	2508.1	− 2528	−19.9	× 45 / 213	−4.2
6	35,305	2566.3	− 2552	14.3	× 63 / 213	4.2
Sum, rounded to a whole point						−3

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,153	2475.2	− 2436	39.2	× 63 / 217	11.4
4	35,154	2484.8	− 2485	−0.2	× 53 / 217	0
5	35,155	2509.2	− 2528	−18.8	× 52 / 217	−4.5
6	35,156	2597.7	− 2552	45.7	× 49 / 217	10.3
Sum, rounded to a whole point						17

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −38, −25, −45, −44, −11, −8, −24, −3, 17 → −20.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 13 · 2016→2017: 20 · 2017→2018: 1 · 2018→2019: 33 · 2019→2022: 3 · 2022→2023: 16 · 2023→2024: 21 · 2024→2025: 20 → average 15.9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 15.9 × 2.66 = 42.3. Upper limit 22.2, lower limit −62.4.

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.