Achieve Charter School Of Paradise Inc.: 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	4,990	2456.3	− 2436	20.3	× 20 / 154	2.6
4	4,993	2472.0	− 2485	−13	× 26 / 154	−2.2
5	4,994	2501.6	− 2528	−26.4	× 27 / 154	−4.6
6	4,997	2525.4	− 2552	−26.6	× 23 / 154	−4
7	4,998	2561.5	− 2567	−5.5	× 29 / 154	−1
8	5,001	2588.9	− 2586	2.9	× 29 / 154	0.5
Sum, rounded to a whole point						−9

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	4,472	2458.0	− 2436	22	× 23 / 159	3.2
4	4,475	2496.3	− 2485	11.3	× 26 / 159	1.8
5	4,476	2509.5	− 2528	−18.5	× 27 / 159	−3.1
6	4,479	2529.8	− 2552	−22.2	× 30 / 159	−4.2
7	4,480	2572.2	− 2567	5.2	× 24 / 159	0.8
8	4,483	2592.0	− 2586	6	× 29 / 159	1.1
Sum, rounded to a whole point						0

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	4,565	2434.2	− 2436	−1.8	× 24 / 159	−0.3
4	4,567	2463.8	− 2485	−21.2	× 25 / 159	−3.3
5	4,569	2512.7	− 2528	−15.3	× 26 / 159	−2.5
6	4,571	2490.4	− 2552	−61.6	× 28 / 159	−10.8
7	4,573	2553.0	− 2567	−14	× 30 / 159	−2.6
8	4,574	2599.8	− 2586	13.8	× 26 / 159	2.3
Sum, rounded to a whole point						−17

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	4,555	2459.6	− 2436	23.6	× 22 / 155	3.3
4	4,556	2488.6	− 2485	3.6	× 25 / 155	0.6
5	4,559	2513.4	− 2528	−14.6	× 25 / 155	−2.4
6	4,561	2531.7	− 2552	−20.3	× 29 / 155	−3.8
7	4,563	2520.2	− 2567	−46.8	× 29 / 155	−8.8
8	4,564	2575.4	− 2586	−10.6	× 25 / 155	−1.7
Sum, rounded to a whole point						−13

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	4,587	2472.2	− 2436	36.2	× 18 / 126	5.2
4	4,588	2464.6	− 2485	−20.4	× 25 / 126	−4
5	4,589	2495.7	− 2528	−32.3	× 25 / 126	−6.4
6	4,590	2478.8	− 2552	−73.2	× 25 / 126	−14.5
7	4,591	2560.0	− 2567	−7	× 17 / 126	−0.9
8	4,592	2518.4	− 2586	−67.6	× 16 / 126	−8.6
Sum, rounded to a whole point						−29

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	4,389	2426.6	− 2436	−9.4	× 22 / 137	−1.5
4	4,390	2500.5	− 2485	15.5	× 24 / 137	2.7
5	4,391	2533.8	− 2528	5.8	× 26 / 137	1.1
6	4,392	2504.4	− 2552	−47.6	× 18 / 137	−6.3
7	4,393	2537.5	− 2567	−29.5	× 21 / 137	−4.5
8	4,394	2525.7	− 2586	−60.3	× 26 / 137	−11.4
Sum, rounded to a whole point						−20

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	4,469	2317.1	− 2436	−118.9	× 14 / 42	−39.6
4	4,470	2439.4	− 2485	−45.6	× 16 / 42	−17.4
5	4,471	2513.8	− 2528	−14.2	× 12 / 42	−4.1
Sum, rounded to a whole point						−61

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	4,459	2433.8	− 2436	−2.2	× 24 / 53	−1
4	4,460	2417.3	− 2485	−67.7	× 14 / 53	−17.9
5	4,461	2452.2	− 2528	−75.8	× 15 / 53	−21.5
Sum, rounded to a whole point						−40

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	4,417	2344.4	− 2436	−91.6	× 18 / 61	−27
4	4,418	2469.5	− 2485	−15.5	× 25 / 61	−6.4
5	4,419	2429.2	− 2528	−98.8	× 18 / 61	−29.2
Sum, rounded to a whole point						−63

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	4,368	2370.5	− 2436	−65.5	× 19 / 81	−15.4
4	4,369	2407.3	− 2485	−77.7	× 23 / 81	−22.1
5	4,370	2514.4	− 2528	−13.6	× 23 / 81	−3.9
6	4,371	2440.3	− 2552	−111.7	× 16 / 81	−22.1
Sum, rounded to a whole point						−63

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −9, 0, −17, −13, −29, −20, −61, −40, −63, −63 → −31.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 9 · 2016→2017: 17 · 2017→2018: 4 · 2018→2019: 16 · 2019→2021: 9 · 2021→2022: 41 · 2022→2023: 21 · 2023→2024: 23 · 2024→2025: 0 → average 15.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 15.6 × 2.66 = 41.5. Upper limit 10, lower limit −73.

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.