Nevada County Office of Education: english

The shaded band is this district'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	47,184	2403.2	− 2432	−28.8	× 94 / 848	−3.2
4	47,185	2450.6	− 2473	−22.4	× 100 / 848	−2.6
5	47,188	2495.8	− 2502	−6.2	× 111 / 848	−0.8
6	47,189	2512.1	− 2531	−18.9	× 126 / 848	−2.8
7	47,192	2554.4	− 2552	2.4	× 132 / 848	0.4
8	47,193	2552.1	− 2567	−14.9	× 149 / 848	−2.6
11	47,196	2586.2	− 2583	3.2	× 136 / 848	0.5
Sum, rounded to a whole point						−11

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	43,864	2435.5	− 2432	3.5	× 67 / 576	0.4
4	43,865	2446.9	− 2473	−26.1	× 72 / 576	−3.3
5	43,868	2517.0	− 2502	15	× 67 / 576	1.7
6	43,869	2521.1	− 2531	−9.9	× 79 / 576	−1.4
7	43,871	2565.8	− 2552	13.8	× 86 / 576	2.1
8	43,874	2579.6	− 2567	12.6	× 93 / 576	2
11	43,876	2578.8	− 2583	−4.2	× 112 / 576	−0.8
Sum, rounded to a whole point						1

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	44,939	2405.4	− 2432	−26.6	× 66 / 580	−3
4	44,940	2465.0	− 2473	−8	× 73 / 580	−1
5	44,943	2505.3	− 2502	3.3	× 76 / 580	0.4
6	44,945	2542.1	− 2531	11.1	× 83 / 580	1.6
7	44,947	2561.7	− 2552	9.7	× 91 / 580	1.5
8	44,948	2575.5	− 2567	8.5	× 103 / 580	1.5
11	44,951	2601.8	− 2583	18.8	× 88 / 580	2.9
Sum, rounded to a whole point						4

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	44,950	2383.7	− 2432	−48.3	× 87 / 664	−6.3
4	44,951	2458.4	− 2473	−14.6	× 79 / 664	−1.7
5	44,954	2501.8	− 2502	−0.2	× 89 / 664	0
6	44,955	2525.0	− 2531	−6	× 91 / 664	−0.8
7	44,958	2550.2	− 2552	−1.8	× 101 / 664	−0.3
8	44,959	2571.9	− 2567	4.9	× 114 / 664	0.8
11	44,962	2561.8	− 2583	−21.2	× 103 / 664	−3.3
Sum, rounded to a whole point						−12

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	45,072	2405.4	− 2432	−26.6	× 95 / 687	−3.7
4	45,073	2437.9	− 2473	−35.1	× 92 / 687	−4.7
5	45,074	2493.7	− 2502	−8.3	× 81 / 687	−1
6	45,075	2519.5	− 2531	−11.5	× 94 / 687	−1.6
7	45,076	2540.6	− 2552	−11.4	× 112 / 687	−1.9
8	45,077	2569.9	− 2567	2.9	× 109 / 687	0.5
11	45,078	2635.1	− 2583	52.1	× 104 / 687	7.9
Sum, rounded to a whole point						−4

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	43,789	2443.9	− 2432	11.9	× 41 / 245	2
4	43,790	2486.1	− 2473	13.1	× 41 / 245	2.2
5	43,791	2507.2	− 2502	5.2	× 51 / 245	1.1
6	43,792	2518.5	− 2531	−12.5	× 43 / 245	−2.2
7	43,793	2543.7	− 2552	−8.3	× 35 / 245	−1.2
8	43,794	2601.7	− 2567	34.7	× 34 / 245	4.8
Sum, rounded to a whole point						7

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	44,820	2403.0	− 2432	−29	× 63 / 498	−3.7
4	44,821	2464.6	− 2473	−8.4	× 61 / 498	−1
5	44,822	2499.6	− 2502	−2.4	× 62 / 498	−0.3
6	44,823	2517.7	− 2531	−13.3	× 75 / 498	−2
7	44,824	2544.9	− 2552	−7.1	× 71 / 498	−1
8	44,825	2572.2	− 2567	5.2	× 77 / 498	0.8
11	44,826	2606.9	− 2583	23.9	× 89 / 498	4.3
Sum, rounded to a whole point						−3

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	44,792	2427.6	− 2432	−4.4	× 72 / 557	−0.6
4	44,793	2443.7	− 2473	−29.3	× 73 / 557	−3.8
5	44,794	2495.6	− 2502	−6.4	× 73 / 557	−0.8
6	44,795	2496.3	− 2531	−34.7	× 67 / 557	−4.2
7	44,796	2561.2	− 2552	9.2	× 87 / 557	1.4
8	44,797	2528.0	− 2567	−39	× 82 / 557	−5.7
11	44,798	2590.1	− 2583	7.1	× 103 / 557	1.3
Sum, rounded to a whole point						−12

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	44,629	2380.9	− 2432	−51.1	× 62 / 578	−5.5
4	44,630	2441.0	− 2473	−32	× 85 / 578	−4.7
5	44,631	2465.0	− 2502	−37	× 73 / 578	−4.7
6	44,632	2502.0	− 2531	−29	× 78 / 578	−3.9
7	44,633	2525.1	− 2552	−26.9	× 83 / 578	−3.9
8	44,634	2553.2	− 2567	−13.8	× 105 / 578	−2.5
11	44,635	2583.2	− 2583	0.2	× 92 / 578	0
Sum, rounded to a whole point						−25

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	44,369	2376.3	− 2432	−55.7	× 68 / 591	−6.4
4	44,370	2438.3	− 2473	−34.7	× 77 / 591	−4.5
5	44,371	2466.0	− 2502	−36	× 91 / 591	−5.5
6	44,372	2480.1	− 2531	−50.9	× 90 / 591	−7.8
7	44,373	2536.9	− 2552	−15.1	× 73 / 591	−1.9
8	44,374	2549.4	− 2567	−17.6	× 94 / 591	−2.8
11	44,375	2595.8	− 2583	12.8	× 98 / 591	2.1
Sum, rounded to a whole point						−27

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	44,234	2381.0	− 2432	−51	× 75 / 552	−6.9
4	44,235	2422.4	− 2473	−50.6	× 75 / 552	−6.9
5	44,236	2462.6	− 2502	−39.4	× 83 / 552	−5.9
6	44,237	2484.7	− 2531	−46.3	× 98 / 552	−8.2
7	44,238	2523.7	− 2552	−28.3	× 98 / 552	−5
8	44,239	2552.4	− 2567	−14.6	× 68 / 552	−1.8
11	44,240	2546.9	− 2583	−36.1	× 55 / 552	−3.6
Sum, rounded to a whole point						−38

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −11, 1, 4, −12, −4, 7, −3, −12, −25, −27, −38 → −10.9
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 12 · 2016→2017: 3 · 2017→2018: 16 · 2018→2019: 8 · 2019→2021: 11 · 2021→2022: 10 · 2022→2023: 9 · 2023→2024: 13 · 2024→2025: 2 · 2025→2026: 11 → average 9.5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.5 × 2.66 = 25.3. Upper limit 14.4, lower limit −36.2.

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 — for a district, the total across its schools. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.

Nevada County Office of Education