Great Valley 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	80,002	2378.9	− 2432	−53.1	× 121 / 785	−8.2
4	80,005	2418.1	− 2473	−54.9	× 137 / 785	−9.6
5	80,006	2456.6	− 2502	−45.4	× 134 / 785	−7.7
6	80,009	2482.9	− 2531	−48.1	× 128 / 785	−7.8
7	80,010	2495.6	− 2552	−56.4	× 128 / 785	−9.2
8	80,013	2516.1	− 2567	−50.9	× 137 / 785	−8.9
Sum, rounded to a whole point						−51

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	74,134	2363.1	− 2432	−68.9	× 127 / 786	−11.1
4	74,137	2410.5	− 2473	−62.5	× 131 / 786	−10.4
5	74,138	2461.8	− 2502	−40.2	× 136 / 786	−7
6	74,140	2492.1	− 2531	−38.9	× 134 / 786	−6.6
7	74,142	2496.1	− 2552	−55.9	× 135 / 786	−9.6
8	74,144	2525.3	− 2567	−41.7	× 123 / 786	−6.5
Sum, rounded to a whole point						−51

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,122	2368.0	− 2432	−64	× 114 / 792	−9.2
4	76,123	2406.4	− 2473	−66.6	× 121 / 792	−10.2
5	76,126	2470.1	− 2502	−31.9	× 130 / 792	−5.2
6	76,128	2494.3	− 2531	−36.7	× 159 / 792	−7.4
7	76,129	2491.9	− 2552	−60.1	× 136 / 792	−10.3
8	76,132	2527.0	− 2567	−40	× 132 / 792	−6.7
Sum, rounded to a whole point						−49

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,313	2375.2	− 2432	−56.8	× 105 / 754	−7.9
4	76,314	2419.6	− 2473	−53.4	× 121 / 754	−8.6
5	76,317	2466.8	− 2502	−35.2	× 117 / 754	−5.5
6	76,318	2508.6	− 2531	−22.4	× 135 / 754	−4
7	76,321	2530.5	− 2552	−21.5	× 137 / 754	−3.9
8	76,322	2542.5	− 2567	−24.5	× 139 / 754	−4.5
Sum, rounded to a whole point						−34

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,830	2402.1	− 2432	−29.9	× 115 / 733	−4.7
4	76,831	2403.2	− 2473	−69.8	× 104 / 733	−9.9
5	76,832	2467.2	− 2502	−34.8	× 124 / 733	−5.9
6	76,833	2490.3	− 2531	−40.7	× 115 / 733	−6.4
7	76,834	2536.9	− 2552	−15.1	× 136 / 733	−2.8
8	76,835	2543.4	− 2567	−23.6	× 139 / 733	−4.5
Sum, rounded to a whole point						−34

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,976	2353.6	− 2432	−78.4	× 91 / 640	−11.1
4	76,977	2412.2	− 2473	−60.8	× 104 / 640	−9.9
5	76,978	2453.1	− 2502	−48.9	× 106 / 640	−8.1
6	76,979	2497.9	− 2531	−33.1	× 102 / 640	−5.3
7	76,980	2510.5	− 2552	−41.5	× 113 / 640	−7.3
8	76,981	2536.2	− 2567	−30.8	× 124 / 640	−6
Sum, rounded to a whole point						−48

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,970	2345.8	− 2432	−86.2	× 95 / 621	−13.2
4	76,971	2392.6	− 2473	−80.4	× 100 / 621	−12.9
5	76,972	2451.7	− 2502	−50.3	× 105 / 621	−8.5
6	76,973	2488.9	− 2531	−42.1	× 105 / 621	−7.1
7	76,974	2540.1	− 2552	−11.9	× 116 / 621	−2.2
8	76,975	2523.7	− 2567	−43.3	× 100 / 621	−7
Sum, rounded to a whole point						−51

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,970	2359.9	− 2432	−72.1	× 115 / 656	−12.6
4	76,971	2390.4	− 2473	−82.6	× 104 / 656	−13.1
5	76,972	2443.4	− 2502	−58.6	× 101 / 656	−9
6	76,973	2490.0	− 2531	−41	× 104 / 656	−6.5
7	76,974	2529.8	− 2552	−22.2	× 106 / 656	−3.6
8	76,975	2560.3	− 2567	−6.7	× 126 / 656	−1.3
Sum, rounded to a whole point						−46

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,622	2358.3	− 2432	−73.7	× 98 / 608	−11.9
4	76,623	2392.6	− 2473	−80.4	× 104 / 608	−13.8
5	76,624	2442.4	− 2502	−59.6	× 102 / 608	−10
6	76,625	2488.7	− 2531	−42.3	× 89 / 608	−6.2
7	76,626	2508.7	− 2552	−43.3	× 107 / 608	−7.6
8	76,627	2532.4	− 2567	−34.6	× 108 / 608	−6.1
Sum, rounded to a whole point						−56

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −51, −51, −49, −34, −34, −48, −51, −46, −56 → −46.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 0 · 2016→2017: 2 · 2017→2018: 15 · 2018→2019: 0 · 2019→2022: 14 · 2022→2023: 3 · 2023→2024: 5 · 2024→2025: 10 → average 6.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6.1 × 2.66 = 16.2. Upper limit −30.5, lower limit −62.9.

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.