Mariposa: math · Schoolio

The shaded band is this county'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	42,853	2401.8	− 2436	−34.2	× 150 / 914	−5.6
4	42,855	2430.6	− 2485	−54.4	× 138 / 914	−8.2
5	42,857	2476.0	− 2528	−52	× 116 / 914	−6.6
6	42,859	2502.4	− 2552	−49.6	× 127 / 914	−6.9
7	42,861	2531.2	− 2567	−35.8	× 137 / 914	−5.4
8	42,864	2558.2	− 2586	−27.8	× 149 / 914	−4.5
11	42,865	2585.7	− 2628	−42.3	× 97 / 914	−4.5
Sum, rounded to a whole point						−42

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,561	2403.3	− 2436	−32.7	× 126 / 961	−4.3
4	39,564	2432.9	− 2485	−52.1	× 153 / 961	−8.3
5	39,566	2468.1	− 2528	−59.9	× 148 / 961	−9.2
6	39,567	2508.8	− 2552	−43.2	× 124 / 961	−5.6
7	39,570	2531.3	− 2567	−35.7	× 132 / 961	−4.9
8	39,572	2540.7	− 2586	−45.3	× 153 / 961	−7.2
11	39,574	2564.4	− 2628	−63.6	× 125 / 961	−8.3
Sum, rounded to a whole point						−48

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,595	2414.7	− 2436	−21.3	× 133 / 918	−3.1
4	40,597	2446.5	− 2485	−38.5	× 121 / 918	−5.1
5	40,599	2468.9	− 2528	−59.1	× 152 / 918	−9.8
6	40,600	2505.2	− 2552	−46.8	× 143 / 918	−7.3
7	40,602	2552.3	− 2567	−14.7	× 128 / 918	−2
8	40,604	2544.0	− 2586	−42	× 138 / 918	−6.3
11	40,606	2565.0	− 2628	−63	× 103 / 918	−7.1
Sum, rounded to a whole point						−41

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,609	2416.5	− 2436	−19.5	× 149 / 977	−3
4	40,612	2448.9	− 2485	−36.1	× 138 / 977	−5.1
5	40,613	2483.1	− 2528	−44.9	× 128 / 977	−5.9
6	40,616	2510.6	− 2552	−41.4	× 151 / 977	−6.4
7	40,617	2538.8	− 2567	−28.2	× 137 / 977	−4
8	40,620	2573.7	− 2586	−12.3	× 126 / 977	−1.6
11	40,621	2574.7	− 2628	−53.3	× 148 / 977	−8.1
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	40,755	2431.6	− 2436	−4.4	× 130 / 966	−0.6
4	40,756	2462.6	− 2485	−22.4	× 143 / 966	−3.3
5	40,757	2479.2	− 2528	−48.8	× 150 / 966	−7.6
6	40,758	2522.0	− 2552	−30	× 129 / 966	−4
7	40,759	2527.1	− 2567	−39.9	× 151 / 966	−6.2
8	40,760	2540.1	− 2586	−45.9	× 138 / 966	−6.6
11	40,761	2579.0	− 2628	−49	× 125 / 966	−6.3
Sum, rounded to a whole point						−35

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	39,692	2400.1	− 2436	−35.9	× 115 / 788	−5.2
4	39,693	2430.9	− 2485	−54.1	× 122 / 788	−8.4
5	39,694	2445.3	− 2528	−82.7	× 115 / 788	−12.1
6	39,695	2456.6	− 2552	−95.4	× 116 / 788	−14
7	39,696	2507.1	− 2567	−59.9	× 133 / 788	−10.1
8	39,697	2532.1	− 2586	−53.9	× 110 / 788	−7.5
11	39,698	2595.1	− 2628	−32.9	× 77 / 788	−3.2
Sum, rounded to a whole point						−61

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,500	2410.6	− 2436	−25.4	× 122 / 916	−3.4
4	40,501	2440.4	− 2485	−44.6	× 128 / 916	−6.2
5	40,502	2457.5	− 2528	−70.5	× 141 / 916	−10.9
6	40,503	2485.9	− 2552	−66.1	× 125 / 916	−9
7	40,504	2508.3	− 2567	−58.7	× 130 / 916	−8.3
8	40,505	2515.9	− 2586	−70.1	× 153 / 916	−11.7
11	40,506	2496.5	− 2628	−131.5	× 117 / 916	−16.8
Sum, rounded to a whole point						−66

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,543	2407.6	− 2436	−28.4	× 136 / 926	−4.2
4	40,544	2444.1	− 2485	−40.9	× 137 / 926	−6.1
5	40,545	2454.6	− 2528	−73.4	× 134 / 926	−10.6
6	40,546	2454.3	− 2552	−97.7	× 146 / 926	−15.4
7	40,547	2507.1	− 2567	−59.9	× 132 / 926	−8.5
8	40,548	2506.2	− 2586	−79.8	× 131 / 926	−11.3
11	40,549	2524.6	− 2628	−103.4	× 110 / 926	−12.3
Sum, rounded to a whole point						−68

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,368	2407.5	− 2436	−28.5	× 137 / 941	−4.1
4	40,369	2450.8	− 2485	−34.2	× 136 / 941	−4.9
5	40,370	2437.0	− 2528	−91	× 143 / 941	−13.8
6	40,371	2489.6	− 2552	−62.4	× 132 / 941	−8.8
7	40,372	2498.9	− 2567	−68.1	× 145 / 941	−10.5
8	40,373	2519.9	− 2586	−66.1	× 136 / 941	−9.6
11	40,374	2507.7	− 2628	−120.3	× 112 / 941	−14.3
Sum, rounded to a whole point						−66

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,151	2391.1	− 2436	−44.9	× 128 / 937	−6.1
4	40,152	2428.6	− 2485	−56.4	× 137 / 937	−8.2
5	40,153	2446.7	− 2528	−81.3	× 132 / 937	−11.5
6	40,154	2475.8	− 2552	−76.2	× 128 / 937	−10.4
7	40,155	2534.0	− 2567	−33	× 129 / 937	−4.5
8	40,156	2511.6	− 2586	−74.4	× 137 / 937	−10.9
11	40,157	2547.9	− 2628	−80.1	× 146 / 937	−12.5
Sum, rounded to a whole point						−64

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,059	2385.1	− 2436	−50.9	× 138 / 916	−7.7
4	40,060	2436.8	− 2485	−48.2	× 126 / 916	−6.6
5	40,061	2424.4	− 2528	−103.6	× 142 / 916	−16.1
6	40,062	2464.9	− 2552	−87.1	× 131 / 916	−12.5
7	40,063	2495.0	− 2567	−72	× 133 / 916	−10.5
8	40,064	2516.7	− 2586	−69.3	× 132 / 916	−10
11	40,065	2508.1	− 2628	−119.9	× 114 / 916	−14.9
Sum, rounded to a whole point						−78

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −42, −48, −41, −34, −35, −61, −66, −68, −66, −64, −78 → −54.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 6 · 2016→2017: 7 · 2017→2018: 7 · 2018→2019: 1 · 2019→2021: 26 · 2021→2022: 5 · 2022→2023: 2 · 2023→2024: 2 · 2024→2025: 2 · 2025→2026: 14 → average 7.2
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7.2 × 2.66 = 19.2. Upper limit −35.6, lower limit −74.

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 county, 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.

Districts in Mariposa County

Mariposa County Unified