Grunsky 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	80,783	2346.3	− 2432	−85.7	× 67 / 377	−15.2
4	80,786	2361.5	− 2473	−111.5	× 61 / 377	−18
5	80,787	2400.2	− 2502	−101.8	× 58 / 377	−15.7
6	80,790	2458.7	− 2531	−72.3	× 70 / 377	−13.4
7	80,791	2454.5	− 2552	−97.5	× 59 / 377	−15.3
8	80,794	2490.1	− 2567	−76.9	× 62 / 377	−12.6
Sum, rounded to a whole point						−90

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	74,885	2325.9	− 2432	−106.1	× 64 / 375	−18.1
4	74,887	2377.0	− 2473	−96	× 65 / 375	−16.6
5	74,889	2419.7	− 2502	−82.3	× 65 / 375	−14.3
6	74,891	2432.9	− 2531	−98.1	× 56 / 375	−14.6
7	74,892	2448.8	− 2552	−103.2	× 63 / 375	−17.3
8	74,894	2496.5	− 2567	−70.5	× 62 / 375	−11.7
Sum, rounded to a whole point						−93

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,893	2302.7	− 2432	−129.3	× 56 / 392	−18.5
4	76,896	2359.6	− 2473	−113.4	× 67 / 392	−19.4
5	76,898	2410.0	− 2502	−92	× 72 / 392	−16.9
6	76,899	2427.1	− 2531	−103.9	× 67 / 392	−17.8
7	76,902	2461.1	− 2552	−90.9	× 65 / 392	−15.1
8	76,903	2495.3	− 2567	−71.7	× 65 / 392	−11.9
Sum, rounded to a whole point						−99

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,082	2327.4	− 2432	−104.6	× 68 / 365	−19.5
4	77,085	2391.6	− 2473	−81.4	× 46 / 365	−10.3
5	77,086	2434.2	− 2502	−67.8	× 60 / 365	−11.1
6	77,088	2451.9	− 2531	−79.1	× 66 / 365	−14.3
7	77,090	2458.6	− 2552	−93.4	× 61 / 365	−15.6
8	77,093	2500.8	− 2567	−66.2	× 64 / 365	−11.6
Sum, rounded to a whole point						−82

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,598	2363.8	− 2432	−68.2	× 67 / 364	−12.6
4	77,599	2383.6	− 2473	−89.4	× 55 / 364	−13.5
5	77,600	2404.2	− 2502	−97.8	× 59 / 364	−15.9
6	77,601	2464.6	− 2531	−66.4	× 58 / 364	−10.6
7	77,602	2464.8	− 2552	−87.2	× 62 / 364	−14.9
8	77,603	2470.9	− 2567	−96.1	× 63 / 364	−16.6
Sum, rounded to a whole point						−84

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,748	2405.7	− 2432	−26.3	× 41 / 331	−3.3
4	77,749	2381.9	− 2473	−91.1	× 63 / 331	−17.3
5	77,750	2392.7	− 2502	−109.3	× 60 / 331	−19.8
6	77,751	2469.9	− 2531	−61.1	× 52 / 331	−9.6
7	77,752	2436.1	− 2552	−115.9	× 60 / 331	−21
8	77,753	2477.8	− 2567	−89.2	× 55 / 331	−14.8
Sum, rounded to a whole point						−86

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,740	2337.0	− 2432	−95	× 46 / 332	−13.2
4	77,741	2416.6	− 2473	−56.4	× 47 / 332	−8
5	77,742	2431.4	− 2502	−70.6	× 62 / 332	−13.2
6	77,743	2465.3	− 2531	−65.7	× 63 / 332	−12.5
7	77,744	2456.2	− 2552	−95.8	× 58 / 332	−16.7
8	77,745	2456.9	− 2567	−110.1	× 56 / 332	−18.6
Sum, rounded to a whole point						−82

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,758	2377.0	− 2432	−55	× 35 / 314	−6.1
4	77,759	2356.4	− 2473	−116.6	× 54 / 314	−20.1
5	77,760	2478.8	− 2502	−23.2	× 52 / 314	−3.8
6	77,761	2471.0	− 2531	−60	× 50 / 314	−9.6
7	77,762	2456.0	− 2552	−96	× 64 / 314	−19.6
8	77,763	2455.4	− 2567	−111.6	× 59 / 314	−21
Sum, rounded to a whole point						−80

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,420	2371.0	− 2432	−61	× 43 / 286	−9.2
4	77,421	2389.9	− 2473	−83.1	× 30 / 286	−8.7
5	77,422	2411.9	− 2502	−90.1	× 62 / 286	−19.5
6	77,423	2550.6	− 2531	19.6	× 39 / 286	2.7
7	77,424	2480.6	− 2552	−71.4	× 51 / 286	−12.7
8	77,425	2506.7	− 2567	−60.3	× 61 / 286	−12.9
Sum, rounded to a whole point						−60

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −90, −93, −99, −82, −84, −86, −82, −80, −60 → −84
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 3 · 2016→2017: 6 · 2017→2018: 17 · 2018→2019: 2 · 2019→2022: 2 · 2022→2023: 4 · 2023→2024: 2 · 2024→2025: 20 → average 7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7 × 2.66 = 18.6. Upper limit −65.4, lower limit −102.6.

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.