Stonegate 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	87,299	2435.6	− 2436	−0.4	× 70 / 377	−0.1
4	87,302	2485.0	− 2485	0	× 92 / 377	0
5	87,303	2511.9	− 2528	−16.1	× 63 / 377	−2.7
6	87,306	2498.4	− 2552	−53.6	× 95 / 377	−13.5
7	87,307	2508.5	− 2567	−58.5	× 57 / 377	−8.8
Sum, rounded to a whole point						−25

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,034	2435.3	− 2436	−0.7	× 87 / 422	−0.1
4	81,035	2459.1	− 2485	−25.9	× 74 / 422	−4.5
5	81,038	2527.7	− 2528	−0.3	× 92 / 422	−0.1
6	81,039	2508.4	− 2552	−43.6	× 62 / 422	−6.4
7	81,041	2555.1	− 2567	−11.9	× 59 / 422	−1.7
8	81,044	2567.8	− 2586	−18.2	× 48 / 422	−2.1
Sum, rounded to a whole point						−15

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,267	2437.1	− 2436	1.1	× 91 / 464	0.2
4	83,270	2463.1	− 2485	−21.9	× 90 / 464	−4.2
5	83,272	2509.6	− 2528	−18.4	× 77 / 464	−3.1
6	83,274	2534.4	− 2552	−17.6	× 93 / 464	−3.5
7	83,275	2533.1	− 2567	−33.9	× 55 / 464	−4
8	83,277	2605.8	− 2586	19.8	× 58 / 464	2.5
Sum, rounded to a whole point						−12

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,496	2422.8	− 2436	−13.2	× 66 / 440	−2
4	83,497	2474.2	− 2485	−10.8	× 89 / 440	−2.2
5	83,500	2516.8	− 2528	−11.2	× 81 / 440	−2.1
6	83,501	2495.7	− 2552	−56.3	× 77 / 440	−9.9
7	83,504	2549.4	− 2567	−17.6	× 74 / 440	−3
8	83,505	2528.4	− 2586	−57.6	× 53 / 440	−6.9
Sum, rounded to a whole point						−26

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,112	2421.1	− 2436	−14.9	× 67 / 449	−2.2
4	84,113	2456.6	− 2485	−28.4	× 65 / 449	−4.1
5	84,114	2483.6	− 2528	−44.4	× 93 / 449	−9.2
6	84,115	2525.4	− 2552	−26.6	× 86 / 449	−5.1
7	84,116	2507.8	− 2567	−59.2	× 73 / 449	−9.6
8	84,117	2590.2	− 2586	4.2	× 65 / 449	0.6
Sum, rounded to a whole point						−30

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,273	2397.1	− 2436	−38.9	× 61 / 378	−6.3
4	84,274	2432.7	− 2485	−52.3	× 61 / 378	−8.4
5	84,275	2464.4	− 2528	−63.6	× 64 / 378	−10.8
6	84,276	2490.4	− 2552	−61.6	× 58 / 378	−9.5
7	84,277	2483.3	− 2567	−83.7	× 60 / 378	−13.3
8	84,278	2517.2	− 2586	−68.8	× 74 / 378	−13.5
Sum, rounded to a whole point						−62

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,214	2389.2	− 2436	−46.8	× 42 / 357	−5.5
4	84,215	2452.6	− 2485	−32.4	× 60 / 357	−5.4
5	84,216	2455.6	− 2528	−72.4	× 65 / 357	−13.2
6	84,217	2468.5	− 2552	−83.5	× 65 / 357	−15.2
7	84,218	2535.3	− 2567	−31.7	× 62 / 357	−5.5
8	84,219	2506.4	− 2586	−79.6	× 63 / 357	−14
Sum, rounded to a whole point						−59

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,217	2413.8	− 2436	−22.2	× 57 / 341	−3.7
4	84,218	2424.8	− 2485	−60.2	× 43 / 341	−7.6
5	84,219	2480.1	− 2528	−47.9	× 59 / 341	−8.3
6	84,220	2483.0	− 2552	−69	× 63 / 341	−12.7
7	84,221	2492.3	− 2567	−74.7	× 59 / 341	−12.9
8	84,222	2555.2	− 2586	−30.8	× 60 / 341	−5.4
Sum, rounded to a whole point						−51

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,899	2406.2	− 2436	−29.8	× 42 / 321	−3.9
4	83,900	2442.3	− 2485	−42.7	× 57 / 321	−7.6
5	83,901	2461.3	− 2528	−66.7	× 49 / 321	−10.2
6	83,902	2461.6	− 2552	−90.4	× 60 / 321	−16.9
7	83,903	2474.4	− 2567	−92.6	× 58 / 321	−16.7
8	83,904	2513.2	− 2586	−72.8	× 55 / 321	−12.5
Sum, rounded to a whole point						−68

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −25, −15, −12, −26, −30, −62, −59, −51, −68 → −38.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 10 · 2016→2017: 3 · 2017→2018: 14 · 2018→2019: 4 · 2019→2022: 32 · 2022→2023: 3 · 2023→2024: 8 · 2024→2025: 17 → average 11.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 11.4 × 2.66 = 30.3. Upper limit −8.4, lower limit −69.

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.