George T. Egling Middle: 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
4	5,596	2446.2	− 2485	−38.8	× 82 / 492	−6.5
5	5,597	2455.3	− 2528	−72.7	× 103 / 492	−15.2
6	5,600	2484.8	− 2552	−67.2	× 99 / 492	−13.5
7	5,601	2515.9	− 2567	−51.1	× 114 / 492	−11.8
8	5,604	2543.5	− 2586	−42.5	× 94 / 492	−8.1
Sum, rounded to a whole point						−55

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	5,064	2443.2	− 2485	−41.8	× 104 / 503	−8.6
5	5,067	2461.2	− 2528	−66.8	× 85 / 503	−11.3
6	5,068	2471.3	− 2552	−80.7	× 100 / 503	−16
7	5,071	2511.2	− 2567	−55.8	× 100 / 503	−11.1
8	5,072	2547.3	− 2586	−38.7	× 114 / 503	−8.8
Sum, rounded to a whole point						−56

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	5,170	2460.8	− 2485	−24.2	× 120 / 529	−5.5
5	5,172	2451.7	− 2528	−76.3	× 108 / 529	−15.6
6	5,175	2470.0	− 2552	−82	× 94 / 529	−14.6
7	5,177	2506.6	− 2567	−60.4	× 108 / 529	−12.3
8	5,179	2532.3	− 2586	−53.7	× 99 / 529	−10
Sum, rounded to a whole point						−58

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	5,175	2451.8	− 2485	−33.2	× 124 / 541	−7.6
5	5,176	2469.1	− 2528	−58.9	× 125 / 541	−13.6
6	5,179	2474.9	− 2552	−77.1	× 100 / 541	−14.3
7	5,180	2485.1	− 2567	−81.9	× 95 / 541	−14.4
8	5,183	2535.2	− 2586	−50.8	× 97 / 541	−9.1
Sum, rounded to a whole point						−59

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	5,216	2472.2	− 2485	−12.8	× 105 / 563	−2.4
5	5,217	2469.6	− 2528	−58.4	× 122 / 563	−12.7
6	5,218	2492.9	− 2552	−59.1	× 129 / 563	−13.5
7	5,219	2518.9	− 2567	−48.1	× 104 / 563	−8.9
8	5,220	2532.0	− 2586	−54	× 103 / 563	−9.9
Sum, rounded to a whole point						−47

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	4,980	2430.5	− 2485	−54.5	× 98 / 504	−10.6
5	4,981	2459.2	− 2528	−68.8	× 101 / 504	−13.8
6	4,982	2473.2	− 2552	−78.8	× 90 / 504	−14.1
7	4,983	2482.0	− 2567	−85	× 107 / 504	−18
8	4,984	2485.0	− 2586	−101	× 108 / 504	−21.6
Sum, rounded to a whole point						−78

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	5,055	2461.9	− 2485	−23.1	× 97 / 539	−4.2
5	5,056	2457.6	− 2528	−70.4	× 108 / 539	−14.1
6	5,057	2497.3	− 2552	−54.7	× 112 / 539	−11.4
7	5,058	2506.9	− 2567	−60.1	× 100 / 539	−11.2
8	5,059	2489.7	− 2586	−96.3	× 122 / 539	−21.8
Sum, rounded to a whole point						−63

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	5,057	2462.2	− 2485	−22.8	× 110 / 516	−4.9
5	5,058	2473.5	− 2528	−54.5	× 92 / 516	−9.7
6	5,059	2493.9	− 2552	−58.1	× 117 / 516	−13.2
7	5,060	2520.4	− 2567	−46.6	× 103 / 516	−9.3
8	5,061	2501.9	− 2586	−84.1	× 94 / 516	−15.3
Sum, rounded to a whole point						−52

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	4,992	2464.8	− 2485	−20.2	× 86 / 502	−3.5
5	4,993	2451.6	− 2528	−76.4	× 105 / 502	−16
6	4,994	2486.9	− 2552	−65.1	× 95 / 502	−12.3
7	4,995	2499.1	− 2567	−67.9	× 114 / 502	−15.4
8	4,996	2515.6	− 2586	−70.4	× 102 / 502	−14.3
Sum, rounded to a whole point						−61

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
4	4,956	2462.6	− 2485	−22.4	× 126 / 533	−5.3
5	4,957	2444.4	− 2528	−83.6	× 92 / 533	−14.4
6	4,958	2457.1	− 2552	−94.9	× 110 / 533	−19.6
7	4,959	2510.6	− 2567	−56.4	× 96 / 533	−10.2
8	4,960	2505.3	− 2586	−80.7	× 109 / 533	−16.5
Sum, rounded to a whole point						−66

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −55, −56, −58, −59, −47, −78, −63, −52, −61, −66 → −59.5
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: 2 · 2017→2018: 1 · 2018→2019: 12 · 2019→2021: 31 · 2021→2022: 15 · 2022→2023: 11 · 2023→2024: 9 · 2024→2025: 5 → average 9.7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.7 × 2.66 = 25.8. Upper limit −33.7, lower limit −85.3.

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.