Plumas Charter: 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.

Measured against the grade bars

The state's math test uses one scale for every grade, so a score means the same thing in grade 3 as in grade 11.

3rd The average 3rd grader meets the grade 3 bar. 2465 vs. 2436.
4th The average 4th grader scores just under the grade 3 bar. 2434 vs. 2436. The 4th-grade bar is 2485.
5th The average 5th grader scores 20 points under the grade 4 bar. 2465 vs. 2485. The 5th-grade bar is 2528.
6th The average 6th grader scores just under the grade 6 bar. 2544 vs. 2552.
7th The average 7th grader scores 29 points under the grade 5 bar. 2499 vs. 2528. The 7th-grade bar is 2567.
8th The average 8th grader scores just under the grade 5 bar. 2521 vs. 2528. The 8th-grade bar is 2586.
11th The average 11th grader scores just under the grade 11 bar. 2621 vs. 2628.

2026 results. "Meets standard" is the state's mark for being on track for that grade.

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	54,960	2417.3	− 2436	−18.7	× 15 / 160	−1.8
4	54,963	2469.0	− 2485	−16	× 23 / 160	−2.3
5	54,964	2467.3	− 2528	−60.7	× 16 / 160	−6.1
6	54,967	2514.3	− 2552	−37.7	× 26 / 160	−6.1
7	54,968	2492.7	− 2567	−74.3	× 23 / 160	−10.7
8	54,971	2518.6	− 2586	−67.4	× 33 / 160	−13.9
11	54,972	2523.3	− 2628	−104.7	× 24 / 160	−15.7
Sum, rounded to a whole point						−57

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	51,054	2400.6	− 2436	−35.4	× 22 / 172	−4.5
4	51,056	2452.8	− 2485	−32.2	× 16 / 172	−3
5	51,058	2464.6	− 2528	−63.4	× 33 / 172	−12.2
6	51,059	2458.1	− 2552	−93.9	× 27 / 172	−14.7
7	51,062	2537.4	− 2567	−29.6	× 33 / 172	−5.7
8	51,064	2507.8	− 2586	−78.2	× 18 / 172	−8.2
11	51,065	2592.9	− 2628	−35.1	× 23 / 172	−4.7
Sum, rounded to a whole point						−53

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	52,510	2425.8	− 2436	−10.2	× 16 / 170	−1
4	52,512	2442.2	− 2485	−42.8	× 22 / 170	−5.5
5	52,514	2472.8	− 2528	−55.2	× 18 / 170	−5.8
6	52,516	2481.0	− 2552	−71	× 26 / 170	−10.9
7	52,517	2503.4	− 2567	−63.6	× 25 / 170	−9.4
8	52,519	2558.4	− 2586	−27.6	× 35 / 170	−5.7
11	52,521	2523.6	− 2628	−104.4	× 28 / 170	−17.2
Sum, rounded to a whole point						−55

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	52,582	2404.4	− 2436	−31.6	× 19 / 160	−3.8
4	52,583	2446.3	− 2485	−38.7	× 20 / 160	−4.8
5	52,585	2498.7	− 2528	−29.3	× 21 / 160	−3.8
6	52,587	2535.1	− 2552	−16.9	× 19 / 160	−2
7	52,589	2530.3	− 2567	−36.7	× 27 / 160	−6.2
8	52,591	2519.1	− 2586	−66.9	× 23 / 160	−9.6
11	52,593	2501.5	− 2628	−126.5	× 31 / 160	−24.5
Sum, rounded to a whole point						−55

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	52,766	2409.9	− 2436	−26.1	× 19 / 167	−3
4	52,767	2450.3	− 2485	−34.7	× 23 / 167	−4.8
5	52,768	2483.5	− 2528	−44.5	× 29 / 167	−7.7
6	52,769	2508.6	− 2552	−43.4	× 27 / 167	−7
7	52,770	2536.0	− 2567	−31	× 28 / 167	−5.2
8	52,771	2574.5	− 2586	−11.5	× 25 / 167	−1.7
11	52,772	2528.6	− 2628	−99.4	× 16 / 167	−9.5
Sum, rounded to a whole point						−39

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	51,547	2389.2	− 2436	−46.8	× 18 / 163	−5.2
4	51,548	2464.5	− 2485	−20.5	× 20 / 163	−2.5
5	51,549	2482.6	− 2528	−45.4	× 20 / 163	−5.6
6	51,550	2524.3	− 2552	−27.7	× 23 / 163	−3.9
7	51,551	2551.2	− 2567	−15.8	× 31 / 163	−3
8	51,552	2556.7	− 2586	−29.3	× 29 / 163	−5.2
11	51,553	2562.0	− 2628	−66	× 22 / 163	−8.9
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	52,746	2439.0	− 2436	3	× 12 / 149	0.2
4	52,747	2455.1	− 2485	−29.9	× 16 / 149	−3.2
5	52,748	2487.5	− 2528	−40.5	× 17 / 149	−4.6
6	52,749	2556.4	− 2552	4.4	× 18 / 149	0.5
7	52,750	2520.8	− 2567	−46.2	× 26 / 149	−8.1
8	52,751	2553.8	− 2586	−32.2	× 24 / 149	−5.2
11	52,752	2593.2	− 2628	−34.8	× 36 / 149	−8.4
Sum, rounded to a whole point						−29

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	52,703	2459.6	− 2436	23.6	× 17 / 156	2.6
4	52,704	2448.1	− 2485	−36.9	× 20 / 156	−4.7
5	52,705	2447.2	− 2528	−80.8	× 18 / 156	−9.3
6	52,706	2540.8	− 2552	−11.2	× 19 / 156	−1.4
7	52,707	2549.3	− 2567	−17.7	× 25 / 156	−2.8
8	52,708	2537.6	− 2586	−48.4	× 28 / 156	−8.7
11	52,709	2551.9	− 2628	−76.1	× 29 / 156	−14.1
Sum, rounded to a whole point						−39

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	52,537	2410.4	− 2436	−25.6	× 31 / 166	−4.8
4	52,538	2494.4	− 2485	9.4	× 16 / 166	0.9
5	52,539	2498.5	− 2528	−29.5	× 18 / 166	−3.2
6	52,540	2470.5	− 2552	−81.5	× 21 / 166	−10.3
7	52,541	2509.6	− 2567	−57.4	× 26 / 166	−9
8	52,542	2576.9	− 2586	−9.1	× 28 / 166	−1.5
11	52,543	2558.0	− 2628	−70	× 26 / 166	−11
Sum, rounded to a whole point						−39

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	52,301	2429.4	− 2436	−6.6	× 16 / 150	−0.7
4	52,302	2466.1	− 2485	−18.9	× 24 / 150	−3
5	52,303	2523.9	− 2528	−4.1	× 14 / 150	−0.4
6	52,304	2496.6	− 2552	−55.4	× 15 / 150	−5.5
7	52,305	2529.8	− 2567	−37.2	× 25 / 150	−6.2
8	52,306	2555.3	− 2586	−30.7	× 28 / 150	−5.7
11	52,307	2581.0	− 2628	−47	× 28 / 150	−8.8
Sum, rounded to a whole point						−30

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	52,196	2464.5	− 2436	28.5	× 27 / 170	4.5
4	52,197	2434.2	− 2485	−50.8	× 22 / 170	−6.6
5	52,198	2465.1	− 2528	−62.9	× 22 / 170	−8.1
6	52,199	2544.3	− 2552	−7.7	× 15 / 170	−0.7
7	52,200	2498.9	− 2567	−68.1	× 24 / 170	−9.6
8	52,201	2520.5	− 2586	−65.5	× 32 / 170	−12.3
11	52,202	2620.7	− 2628	−7.3	× 28 / 170	−1.2
Sum, rounded to a whole point						−34

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −57, −53, −55, −55, −39, −34, −29, −39, −39, −30, −34 → −42.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 4 · 2016→2017: 2 · 2017→2018: 0 · 2018→2019: 16 · 2019→2021: 5 · 2021→2022: 5 · 2022→2023: 10 · 2023→2024: 0 · 2024→2025: 9 · 2025→2026: 4 → average 5.5
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 5.5 × 2.66 = 14.6. Upper limit −27.6, lower limit −56.8.

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.