Cedarlane 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	39,344	2413.9	− 2436	−22.1	× 33 / 461	−1.6
4	39,345	2458.6	− 2485	−26.4	× 38 / 461	−2.2
5	39,348	2490.0	− 2528	−38	× 48 / 461	−4
6	39,349	2493.0	− 2552	−59	× 102 / 461	−13.1
7	39,352	2534.3	− 2567	−32.7	× 126 / 461	−8.9
8	39,353	2505.4	− 2586	−80.6	× 114 / 461	−19.9
Sum, rounded to a whole point						−50

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,450	2434.3	− 2436	−1.7	× 32 / 463	−0.1
4	36,452	2502.1	− 2485	17.1	× 35 / 463	1.3
5	36,455	2482.8	− 2528	−45.2	× 36 / 463	−3.5
6	36,457	2518.1	− 2552	−33.9	× 132 / 463	−9.7
7	36,459	2526.0	− 2567	−41	× 102 / 463	−9
8	36,460	2576.1	− 2586	−9.9	× 126 / 463	−2.7
Sum, rounded to a whole point						−24

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,217	2425.3	− 2436	−10.7	× 39 / 481	−0.9
4	37,219	2497.8	− 2485	12.8	× 43 / 481	1.1
5	37,220	2507.0	− 2528	−21	× 37 / 481	−1.6
6	37,222	2535.5	− 2552	−16.5	× 127 / 481	−4.4
7	37,225	2517.5	− 2567	−49.5	× 130 / 481	−13.4
8	37,226	2529.6	− 2586	−56.4	× 105 / 481	−12.3
Sum, rounded to a whole point						−31

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,166	2404.6	− 2436	−31.4	× 26 / 486	−1.7
4	37,168	2484.8	− 2485	−0.2	× 43 / 486	0
5	37,170	2505.2	− 2528	−22.8	× 44 / 486	−2.1
6	37,172	2524.1	− 2552	−27.9	× 122 / 486	−7
7	37,174	2548.0	− 2567	−19	× 124 / 486	−4.8
8	37,176	2573.2	− 2586	−12.8	× 127 / 486	−3.3
Sum, rounded to a whole point						−19

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,368	2438.2	− 2436	2.2	× 38 / 444	0.2
4	37,369	2466.9	− 2485	−18.1	× 25 / 444	−1
5	37,370	2484.5	− 2528	−43.5	× 42 / 444	−4.1
6	37,371	2541.9	− 2552	−10.1	× 97 / 444	−2.2
7	37,372	2568.2	− 2567	1.2	× 118 / 444	0.3
8	37,373	2585.1	− 2586	−0.9	× 124 / 444	−0.3
Sum, rounded to a whole point						−7

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,275	2443.5	− 2436	7.5	× 43 / 445	0.7
4	37,276	2486.9	− 2485	1.9	× 51 / 445	0.2
5	37,277	2515.0	− 2528	−13	× 36 / 445	−1.1
6	37,278	2540.1	− 2552	−11.9	× 105 / 445	−2.8
7	37,279	2526.8	− 2567	−40.2	× 96 / 445	−8.7
8	37,280	2560.9	− 2586	−25.1	× 114 / 445	−6.4
Sum, rounded to a whole point						−18

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,308	2433.6	− 2436	−2.4	× 47 / 464	−0.2
4	37,309	2479.9	− 2485	−5.1	× 46 / 464	−0.5
5	37,310	2515.3	− 2528	−12.7	× 54 / 464	−1.5
6	37,311	2531.7	− 2552	−20.3	× 112 / 464	−4.9
7	37,312	2566.7	− 2567	−0.3	× 109 / 464	−0.1
8	37,313	2542.4	− 2586	−43.6	× 96 / 464	−9
Sum, rounded to a whole point						−16

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	37,162	2426.2	− 2436	−9.8	× 38 / 510	−0.7
4	37,163	2480.8	− 2485	−4.2	× 56 / 510	−0.5
5	37,164	2499.5	− 2528	−28.5	× 53 / 510	−3
6	37,165	2544.6	− 2552	−7.4	× 139 / 510	−2
7	37,166	2567.9	− 2567	0.9	× 118 / 510	0.2
8	37,167	2585.5	− 2586	−0.5	× 106 / 510	−0.1
Sum, rounded to a whole point						−6

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	36,999	2436.1	− 2436	0.1	× 69 / 669	0
4	37,000	2498.8	− 2485	13.8	× 74 / 669	1.5
5	37,001	2482.1	− 2528	−45.9	× 85 / 669	−5.8
6	37,002	2567.4	− 2552	15.4	× 178 / 669	4.1
7	37,003	2592.9	− 2567	25.9	× 141 / 669	5.5
8	37,004	2596.8	− 2586	10.8	× 122 / 669	2
Sum, rounded to a whole point						7

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −50, −24, −31, −19, −7, −18, −16, −6, 7 → −18.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 26 · 2016→2017: 7 · 2017→2018: 12 · 2018→2019: 12 · 2019→2022: 11 · 2022→2023: 2 · 2023→2024: 10 · 2024→2025: 13 → average 11.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 11.6 × 2.66 = 30.9. Upper limit 12.7, lower limit −49.1.

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.