Round Valley Unified: math

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	43,351	2358.7	− 2436	−77.3	× 20 / 151	−10.2
4	43,354	2385.9	− 2485	−99.1	× 18 / 151	−11.8
5	43,355	2386.4	− 2528	−141.6	× 27 / 151	−25.3
6	43,358	2498.7	− 2552	−53.3	× 17 / 151	−6
7	43,359	2413.0	− 2567	−154	× 28 / 151	−28.6
8	43,362	2423.0	− 2586	−163	× 22 / 151	−23.7
11	43,363	2449.3	− 2628	−178.7	× 19 / 151	−22.5
Sum, rounded to a whole point						−128

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,052	2352.2	− 2436	−83.8	× 30 / 169	−14.9
4	40,054	2341.0	− 2485	−144	× 24 / 169	−20.4
5	40,055	2455.7	− 2528	−72.3	× 23 / 169	−9.8
6	40,057	2405.9	− 2552	−146.1	× 33 / 169	−28.5
7	40,060	2442.1	− 2567	−124.9	× 22 / 169	−16.3
8	40,061	2372.8	− 2586	−213.2	× 27 / 169	−34.1
11	40,063	2486.1	− 2628	−141.9	× 10 / 169	−8.4
Sum, rounded to a whole point						−132

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,062	2399.8	− 2436	−36.2	× 23 / 140	−5.9
4	41,065	2388.2	− 2485	−96.8	× 30 / 140	−20.7
5	41,067	2476.7	− 2528	−51.3	× 16 / 140	−5.9
6	41,068	2425.3	− 2552	−126.7	× 18 / 140	−16.3
7	41,070	2463.1	− 2567	−103.9	× 33 / 140	−24.5
8	41,072	2475.9	− 2586	−110.1	× 20 / 140	−15.7
Sum, rounded to a whole point						−89

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,087	2359.3	− 2436	−76.7	× 23 / 194	−9.1
4	41,090	2438.6	− 2485	−46.4	× 26 / 194	−6.2
5	41,091	2446.0	− 2528	−82	× 39 / 194	−16.5
6	41,094	2392.8	− 2552	−159.2	× 23 / 194	−18.9
7	41,095	2440.4	− 2567	−126.6	× 31 / 194	−20.2
8	41,098	2449.5	− 2586	−136.5	× 37 / 194	−26
11	41,099	2430.3	− 2628	−197.7	× 15 / 194	−15.3
Sum, rounded to a whole point						−112

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,239	2378.9	− 2436	−57.1	× 24 / 209	−6.6
4	41,240	2415.4	− 2485	−69.6	× 19 / 209	−6.3
5	41,241	2481.6	− 2528	−46.4	× 32 / 209	−7.1
6	41,242	2421.8	− 2552	−130.2	× 45 / 209	−28
7	41,243	2393.8	− 2567	−173.2	× 24 / 209	−19.9
8	41,244	2458.9	− 2586	−127.1	× 39 / 209	−23.7
11	41,245	2440.5	− 2628	−187.5	× 26 / 209	−23.3
Sum, rounded to a whole point						−115

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,166	2391.6	− 2436	−44.4	× 17 / 112	−6.7
4	40,167	2398.4	− 2485	−86.6	× 25 / 112	−19.3
5	40,168	2438.1	− 2528	−89.9	× 25 / 112	−20.1
7	40,170	2471.8	− 2567	−95.2	× 20 / 112	−17
8	40,171	2398.2	− 2586	−187.8	× 25 / 112	−41.9
Sum, rounded to a whole point						−105

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,996	2419.9	− 2436	−16.1	× 19 / 157	−1.9
4	40,997	2383.8	− 2485	−101.2	× 19 / 157	−12.2
5	40,998	2421.5	− 2528	−106.5	× 28 / 157	−19
6	40,999	2436.0	− 2552	−116	× 26 / 157	−19.2
7	41,000	2432.4	− 2567	−134.6	× 25 / 157	−21.4
8	41,001	2468.9	− 2586	−117.1	× 27 / 157	−20.1
11	41,002	2441.0	− 2628	−187	× 13 / 157	−15.5
Sum, rounded to a whole point						−109

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,025	2344.8	− 2436	−91.2	× 25 / 162	−14.1
4	41,026	2378.7	− 2485	−106.3	× 22 / 162	−14.4
5	41,027	2369.3	− 2528	−158.7	× 27 / 162	−26.5
6	41,028	2401.9	− 2552	−150.1	× 32 / 162	−29.6
7	41,029	2411.5	− 2567	−155.5	× 29 / 162	−27.8
8	41,030	2411.9	− 2586	−174.1	× 27 / 162	−29
Sum, rounded to a whole point						−141

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,846	2353.0	− 2436	−83	× 34 / 183	−15.4
4	40,847	2359.8	− 2485	−125.2	× 25 / 183	−17.1
5	40,848	2370.9	− 2528	−157.1	× 24 / 183	−20.6
6	40,849	2392.4	− 2552	−159.6	× 27 / 183	−23.5
7	40,850	2424.9	− 2567	−142.1	× 37 / 183	−28.7
8	40,851	2425.7	− 2586	−160.3	× 36 / 183	−31.5
Sum, rounded to a whole point						−137

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,611	2368.1	− 2436	−67.9	× 23 / 194	−8.1
4	40,612	2383.0	− 2485	−102	× 32 / 194	−16.8
5	40,613	2369.0	− 2528	−159	× 22 / 194	−18
6	40,614	2375.4	− 2552	−176.6	× 22 / 194	−20
7	40,615	2400.3	− 2567	−166.7	× 32 / 194	−27.5
8	40,616	2393.8	− 2586	−192.2	× 42 / 194	−41.6
11	40,617	2474.4	− 2628	−153.6	× 21 / 194	−16.6
Sum, rounded to a whole point						−149

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,521	2350.9	− 2436	−85.1	× 32 / 181	−15
4	40,522	2399.3	− 2485	−85.7	× 27 / 181	−12.8
5	40,523	2420.9	− 2528	−107.1	× 33 / 181	−19.5
6	40,524	2391.8	− 2552	−160.2	× 20 / 181	−17.7
7	40,525	2372.0	− 2567	−195	× 23 / 181	−24.8
8	40,526	2366.2	− 2586	−219.8	× 32 / 181	−38.9
11	40,527	2351.7	− 2628	−276.3	× 14 / 181	−21.4
Sum, rounded to a whole point						−150

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −128, −132, −89, −112, −115, −105, −109, −141, −137, −149, −150 → −124.3
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: 43 · 2017→2018: 23 · 2018→2019: 3 · 2019→2021: 10 · 2021→2022: 4 · 2022→2023: 32 · 2023→2024: 4 · 2024→2025: 12 · 2025→2026: 1 → average 13.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 13.6 × 2.66 = 36.2. Upper limit −88.1, lower limit −160.5.

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.

Round Valley Unified