Eagle Prairie Elementary: english

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	14,115	2339.4	− 2432	−92.6	× 33 / 103	−29.7
4	14,116	2425.1	− 2473	−47.9	× 33 / 103	−15.3
5	14,118	2449.1	− 2502	−52.9	× 37 / 103	−19
Sum, rounded to a whole point						−64

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,134	2356.3	− 2432	−75.7	× 34 / 104	−24.7
4	13,136	2409.3	− 2473	−63.7	× 33 / 104	−20.2
5	13,138	2445.4	− 2502	−56.6	× 37 / 104	−20.1
Sum, rounded to a whole point						−65

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,465	2375.1	− 2432	−56.9	× 30 / 105	−16.3
4	13,467	2400.3	− 2473	−72.7	× 38 / 105	−26.3
5	13,470	2448.8	− 2502	−53.2	× 37 / 105	−18.7
Sum, rounded to a whole point						−61

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,462	2380.6	− 2432	−51.4	× 30 / 99	−15.6
4	13,463	2412.8	− 2473	−60.2	× 33 / 99	−20.1
5	13,466	2432.6	− 2502	−69.4	× 36 / 99	−25.2
Sum, rounded to a whole point						−61

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,574	2394.4	− 2432	−37.6	× 31 / 99	−11.8
4	13,575	2424.5	− 2473	−48.5	× 35 / 99	−17.1
5	13,576	2454.8	− 2502	−47.2	× 33 / 99	−15.7
Sum, rounded to a whole point						−45

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,338	2331.9	− 2432	−100.1	× 27 / 58	−46.6
4	13,339	2389.8	− 2473	−83.2	× 31 / 58	−44.5
Sum, rounded to a whole point						−91

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,597	2379.8	− 2432	−52.2	× 24 / 88	−14.2
4	13,598	2409.2	− 2473	−63.8	× 30 / 88	−21.8
5	13,599	2444.8	− 2502	−57.2	× 34 / 88	−22.1
Sum, rounded to a whole point						−58

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,574	2365.9	− 2432	−66.1	× 34 / 105	−21.4
4	13,575	2439.1	− 2473	−33.9	× 31 / 105	−10
5	13,576	2479.3	− 2502	−22.7	× 40 / 105	−8.6
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	13,541	2398.5	− 2432	−33.5	× 34 / 94	−12.1
4	13,542	2497.9	− 2473	24.9	× 30 / 94	7.9
5	13,543	2542.0	− 2502	40	× 30 / 94	12.8
Sum, rounded to a whole point						9

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	13,505	2398.1	− 2432	−33.9	× 29 / 92	−10.7
4	13,506	2531.1	− 2473	58.1	× 34 / 92	21.5
5	13,507	2533.3	− 2502	31.3	× 29 / 92	9.9
Sum, rounded to a whole point						21

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −64, −65, −61, −61, −45, −91, −58, −40, 9, 21 → −45.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 1 · 2016→2017: 4 · 2017→2018: 0 · 2018→2019: 16 · 2019→2021: 46 · 2021→2022: 33 · 2022→2023: 18 · 2023→2024: 49 · 2024→2025: 12 → average 19.9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 19.9 × 2.66 = 52.9. Upper limit 7.4, lower limit −98.4.

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.