Skyblue Mesa 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	37,375	2395.6	− 2436	−40.4	× 76 / 297	−10.3
4	37,377	2457.8	− 2485	−27.2	× 70 / 297	−6.4
5	37,379	2465.9	− 2528	−62.1	× 74 / 297	−15.5
6	37,381	2549.7	− 2552	−2.3	× 77 / 297	−0.6
Sum, rounded to a whole point						−33

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	34,772	2418.2	− 2436	−17.8	× 69 / 288	−4.3
4	34,774	2452.5	− 2485	−32.5	× 73 / 288	−8.2
5	34,776	2490.6	− 2528	−37.4	× 74 / 288	−9.6
6	34,779	2520.0	− 2552	−32	× 72 / 288	−8
Sum, rounded to a whole point						−30

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,418	2421.2	− 2436	−14.8	× 61 / 284	−3.2
4	35,421	2467.6	− 2485	−17.4	× 75 / 284	−4.6
5	35,423	2461.9	− 2528	−66.1	× 70 / 284	−16.3
6	35,424	2542.5	− 2552	−9.5	× 78 / 284	−2.6
Sum, rounded to a whole point						−27

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,429	2390.2	− 2436	−45.8	× 54 / 273	−9.1
4	35,431	2464.5	− 2485	−20.5	× 65 / 273	−4.9
5	35,433	2489.9	− 2528	−38.1	× 82 / 273	−11.4
6	35,435	2507.5	− 2552	−44.5	× 72 / 273	−11.7
Sum, rounded to a whole point						−37

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,596	2397.3	− 2436	−38.7	× 79 / 296	−10.3
4	35,597	2469.4	− 2485	−15.6	× 64 / 296	−3.4
5	35,598	2510.4	− 2528	−17.6	× 69 / 296	−4.1
6	35,599	2528.9	− 2552	−23.1	× 84 / 296	−6.6
Sum, rounded to a whole point						−24

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,485	2422.4	− 2436	−13.6	× 72 / 303	−3.2
4	35,486	2489.0	− 2485	4	× 73 / 303	1
5	35,487	2508.8	− 2528	−19.2	× 75 / 303	−4.8
6	35,488	2523.0	− 2552	−29	× 83 / 303	−7.9
Sum, rounded to a whole point						−15

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,490	2414.0	− 2436	−22	× 82 / 322	−5.6
4	35,491	2480.5	− 2485	−4.5	× 76 / 322	−1.1
5	35,492	2503.1	− 2528	−24.9	× 82 / 322	−6.3
6	35,493	2540.6	− 2552	−11.4	× 82 / 322	−2.9
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	35,352	2422.0	− 2436	−14	× 101 / 337	−4.2
4	35,353	2473.1	− 2485	−11.9	× 83 / 337	−2.9
5	35,354	2493.4	− 2528	−34.6	× 70 / 337	−7.2
6	35,355	2522.6	− 2552	−29.4	× 83 / 337	−7.2
Sum, rounded to a whole point						−22

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,193	2421.3	− 2436	−14.7	× 69 / 324	−3.1
4	35,194	2477.3	− 2485	−7.7	× 106 / 324	−2.5
5	35,195	2502.9	− 2528	−25.1	× 81 / 324	−6.3
6	35,196	2556.9	− 2552	4.9	× 68 / 324	1
Sum, rounded to a whole point						−11

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −33, −30, −27, −37, −24, −15, −16, −22, −11 → −23.9
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 3 · 2016→2017: 3 · 2017→2018: 10 · 2018→2019: 13 · 2019→2022: 9 · 2022→2023: 1 · 2023→2024: 6 · 2024→2025: 11 → average 7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7 × 2.66 = 18.6. Upper limit −5.3, lower limit −42.5.

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.