High Desert Premier 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
6	69,751	2406.4	− 2552	−145.6	× 14 / 71	−28.7
7	69,753	2379.9	− 2567	−187.1	× 12 / 71	−31.6
8	69,755	2434.3	− 2586	−151.7	× 28 / 71	−59.8
11	69,757	2481.1	− 2628	−146.9	× 17 / 71	−35.2
Sum, rounded to a whole point						−155

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	64,658	2417.5	− 2552	−134.5	× 15 / 92	−21.9
7	64,660	2428.7	− 2567	−138.3	× 27 / 92	−40.6
8	64,662	2426.6	− 2586	−159.4	× 26 / 92	−45
11	64,664	2427.8	− 2628	−200.2	× 24 / 92	−52.2
Sum, rounded to a whole point						−160

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	66,473	2427.1	− 2552	−124.9	× 16 / 106	−18.9
7	66,476	2425.4	− 2567	−141.6	× 29 / 106	−38.7
8	66,478	2407.9	− 2586	−178.1	× 33 / 106	−55.4
11	66,479	2440.8	− 2628	−187.2	× 28 / 106	−49.4
Sum, rounded to a whole point						−162

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
7	66,547	2461.3	− 2567	−105.7	× 28 / 123	−24.1
8	66,550	2415.5	− 2586	−170.5	× 38 / 123	−52.7
11	66,551	2418.9	− 2628	−209.1	× 57 / 123	−96.9
Sum, rounded to a whole point						−174

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	66,969	2425.8	− 2552	−126.2	× 17 / 121	−17.7
7	66,970	2442.3	− 2567	−124.7	× 20 / 121	−20.6
8	66,971	2450.9	− 2586	−135.1	× 40 / 121	−44.7
11	66,972	2431.9	− 2628	−196.1	× 44 / 121	−71.3
Sum, rounded to a whole point						−154

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
7	67,070	2395.4	− 2567	−171.6	× 14 / 84	−28.6
8	67,071	2460.8	− 2586	−125.2	× 15 / 84	−22.4
11	67,072	2406.9	− 2628	−221.1	× 55 / 84	−144.8
Sum, rounded to a whole point						−196

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
7	67,084	2450.3	− 2567	−116.7	× 14 / 156	−10.5
8	67,085	2388.3	− 2586	−197.7	× 27 / 156	−34.2
11	67,086	2420.6	− 2628	−207.4	× 115 / 156	−152.9
Sum, rounded to a whole point						−198

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
11	67,074	2434.3	− 2628	−193.7	× 97 / 97	−193.7
Sum, rounded to a whole point						−194

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
7	66,818	2346.2	− 2567	−220.8	× 11 / 119	−20.4
8	66,819	2389.4	− 2586	−196.6	× 15 / 119	−24.8
11	66,820	2413.6	− 2628	−214.4	× 93 / 119	−167.6
Sum, rounded to a whole point						−213

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −155, −160, −162, −174, −154, −196, −198, −194, −213 → −178.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 5 · 2016→2017: 2 · 2017→2018: 12 · 2018→2019: 20 · 2019→2022: 42 · 2022→2023: 2 · 2023→2024: 4 · 2024→2025: 19 → average 13.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 13.3 × 2.66 = 35.4. Upper limit −143, lower limit −213.8.

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.