Turner 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	10,903	2386.4	− 2436	−49.6	× 94 / 284	−16.4
4	10,904	2392.7	− 2485	−92.3	× 69 / 284	−22.4
5	10,907	2427.1	− 2528	−100.9	× 66 / 284	−23.4
6	10,908	2448.3	− 2552	−103.7	× 55 / 284	−20.1
Sum, rounded to a whole point						−82

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	9,921	2390.4	− 2436	−45.6	× 69 / 292	−10.8
4	9,922	2408.7	− 2485	−76.3	× 90 / 292	−23.5
5	9,924	2426.6	− 2528	−101.4	× 63 / 292	−21.9
6	9,926	2463.0	− 2552	−89	× 70 / 292	−21.3
Sum, rounded to a whole point						−78

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,249	2379.8	− 2436	−56.2	× 81 / 276	−16.5
4	10,250	2426.1	− 2485	−58.9	× 63 / 276	−13.4
5	10,253	2421.6	− 2528	−106.4	× 79 / 276	−30.5
6	10,255	2490.5	− 2552	−61.5	× 53 / 276	−11.8
Sum, rounded to a whole point						−72

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,267	2416.6	− 2436	−19.4	× 82 / 300	−5.3
4	10,268	2434.2	− 2485	−50.8	× 80 / 300	−13.5
5	10,271	2451.7	− 2528	−76.3	× 63 / 300	−16
6	10,272	2487.1	− 2552	−64.9	× 75 / 300	−16.2
Sum, rounded to a whole point						−51

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,347	2399.6	− 2436	−36.4	× 85 / 310	−10
4	10,348	2465.3	− 2485	−19.7	× 78 / 310	−5
5	10,349	2474.1	− 2528	−53.9	× 79 / 310	−13.7
6	10,350	2486.1	− 2552	−65.9	× 68 / 310	−14.5
Sum, rounded to a whole point						−43

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,340	2379.9	− 2436	−56.1	× 71 / 308	−12.9
4	10,341	2389.1	− 2485	−95.9	× 86 / 308	−26.8
5	10,342	2401.7	− 2528	−126.3	× 74 / 308	−30.3
6	10,343	2432.6	− 2552	−119.4	× 77 / 308	−29.9
Sum, rounded to a whole point						−100

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,328	2398.2	− 2436	−37.8	× 74 / 302	−9.3
4	10,329	2422.4	− 2485	−62.6	× 82 / 302	−17
5	10,330	2420.0	− 2528	−108	× 73 / 302	−26.1
6	10,331	2414.7	− 2552	−137.3	× 73 / 302	−33.2
Sum, rounded to a whole point						−86

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,294	2360.3	− 2436	−75.7	× 85 / 335	−19.2
4	10,295	2410.7	− 2485	−74.3	× 88 / 335	−19.5
5	10,296	2440.8	− 2528	−87.2	× 81 / 335	−21.1
6	10,297	2448.5	− 2552	−103.5	× 81 / 335	−25
Sum, rounded to a whole point						−85

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	10,271	2364.4	− 2436	−71.6	× 76 / 332	−16.4
4	10,272	2407.6	− 2485	−77.4	× 89 / 332	−20.7
5	10,273	2430.1	− 2528	−97.9	× 83 / 332	−24.5
6	10,274	2450.9	− 2552	−101.1	× 84 / 332	−25.6
Sum, rounded to a whole point						−87

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −82, −78, −72, −51, −43, −100, −86, −85, −87 → −76
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 4 · 2016→2017: 6 · 2017→2018: 21 · 2018→2019: 8 · 2019→2022: 57 · 2022→2023: 14 · 2023→2024: 1 · 2024→2025: 2 → average 14.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 14.1 × 2.66 = 37.5. Upper limit −38.5, lower limit −113.5.

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.