San Bernardino County Office Of Educatio: 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	64,117	2319.4	− 2436	−116.6	× 19 / 351	−6.3
4	64,118	2347.5	− 2485	−137.5	× 28 / 351	−11
5	64,121	2360.4	− 2528	−167.6	× 16 / 351	−7.6
6	64,122	2373.2	− 2552	−178.8	× 24 / 351	−12.2
7	64,125	2411.8	− 2567	−155.2	× 34 / 351	−15
8	64,126	2375.9	− 2586	−210.1	× 63 / 351	−37.7
11	64,129	2415.2	− 2628	−212.8	× 167 / 351	−101.2
Sum, rounded to a whole point						−191

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
7	59,471	2388.7	− 2567	−178.3	× 29 / 317	−16.3
8	59,474	2372.8	− 2586	−213.2	× 92 / 317	−61.9
11	59,475	2402.7	− 2628	−225.3	× 196 / 317	−139.3
Sum, rounded to a whole point						−217

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,205	2317.1	− 2436	−118.9	× 30 / 519	−6.9
4	61,207	2333.9	− 2485	−151.1	× 37 / 519	−10.8
5	61,208	2349.0	− 2528	−179	× 26 / 519	−9
6	61,210	2350.2	− 2552	−201.8	× 48 / 519	−18.7
7	61,213	2377.1	− 2567	−189.9	× 51 / 519	−18.7
8	61,214	2376.1	− 2586	−209.9	× 93 / 519	−37.6
11	61,217	2396.6	− 2628	−231.4	× 234 / 519	−104.3
Sum, rounded to a whole point						−206

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,319	2320.5	− 2436	−115.5	× 25 / 576	−5
4	61,322	2326.3	− 2485	−158.7	× 29 / 576	−8
5	61,323	2349.1	− 2528	−178.9	× 39 / 576	−12.1
6	61,326	2361.1	− 2552	−190.9	× 41 / 576	−13.6
7	61,327	2370.9	− 2567	−196.1	× 85 / 576	−28.9
8	61,330	2362.3	− 2586	−223.7	× 109 / 576	−42.3
11	61,331	2398.1	− 2628	−229.9	× 248 / 576	−99
Sum, rounded to a whole point						−209

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,572	2295.1	− 2436	−140.9	× 31 / 626	−7
4	61,573	2347.8	− 2485	−137.2	× 33 / 626	−7.2
5	61,574	2341.8	− 2528	−186.2	× 40 / 626	−11.9
6	61,575	2361.6	− 2552	−190.4	× 49 / 626	−14.9
7	61,576	2374.2	− 2567	−192.8	× 74 / 626	−22.8
8	61,577	2361.8	− 2586	−224.2	× 129 / 626	−46.2
11	61,578	2401.4	− 2628	−226.6	× 270 / 626	−97.7
Sum, rounded to a whole point						−208

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,183	2285.8	− 2436	−150.2	× 32 / 285	−16.9
4	60,184	2302.4	− 2485	−182.6	× 24 / 285	−15.4
5	60,185	2351.9	− 2528	−176.1	× 23 / 285	−14.2
6	60,186	2319.7	− 2552	−232.3	× 23 / 285	−18.7
7	60,187	2386.3	− 2567	−180.7	× 12 / 285	−7.6
8	60,188	2380.9	− 2586	−205.1	× 36 / 285	−25.9
11	60,189	2401.9	− 2628	−226.1	× 135 / 285	−107.1
Sum, rounded to a whole point						−206

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,655	2305.5	− 2436	−130.5	× 18 / 451	−5.2
4	61,656	2330.7	− 2485	−154.3	× 34 / 451	−11.6
5	61,657	2318.9	− 2528	−209.1	× 34 / 451	−15.8
6	61,658	2315.7	− 2552	−236.3	× 40 / 451	−21
7	61,659	2374.9	− 2567	−192.1	× 61 / 451	−26
8	61,660	2363.8	− 2586	−222.2	× 87 / 451	−42.9
11	61,661	2390.4	− 2628	−237.6	× 177 / 451	−93.2
Sum, rounded to a whole point						−216

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,593	2304.1	− 2436	−131.9	× 14 / 472	−3.9
4	61,594	2344.7	− 2485	−140.3	× 19 / 472	−5.6
5	61,595	2340.1	− 2528	−187.9	× 31 / 472	−12.3
6	61,596	2323.0	− 2552	−229	× 34 / 472	−16.5
7	61,597	2354.3	− 2567	−212.7	× 76 / 472	−34.2
8	61,598	2376.9	− 2586	−209.1	× 113 / 472	−50.1
11	61,599	2379.7	− 2628	−248.3	× 185 / 472	−97.3
Sum, rounded to a whole point						−220

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,542	2276.9	− 2436	−159.1	× 20 / 463	−6.9
4	61,543	2328.6	− 2485	−156.4	× 16 / 463	−5.4
5	61,544	2341.8	− 2528	−186.2	× 17 / 463	−6.8
6	61,545	2338.6	− 2552	−213.4	× 42 / 463	−19.4
7	61,546	2365.2	− 2567	−201.8	× 60 / 463	−26.2
8	61,547	2361.8	− 2586	−224.2	× 132 / 463	−63.9
11	61,548	2380.7	− 2628	−247.3	× 176 / 463	−94
Sum, rounded to a whole point						−223

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,291	2258.1	− 2436	−177.9	× 23 / 422	−9.7
4	61,292	2317.0	− 2485	−168	× 28 / 422	−11.1
5	61,293	2322.4	− 2528	−205.6	× 15 / 422	−7.3
6	61,294	2334.6	− 2552	−217.4	× 27 / 422	−13.9
7	61,295	2351.9	− 2567	−215.1	× 51 / 422	−26
8	61,296	2363.1	− 2586	−222.9	× 91 / 422	−48.1
11	61,297	2401.3	− 2628	−226.7	× 187 / 422	−100.5
Sum, rounded to a whole point						−217

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −191, −217, −206, −209, −208, −206, −216, −220, −223, −217 → −211.3
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 26 · 2016→2017: 11 · 2017→2018: 3 · 2018→2019: 1 · 2019→2021: 2 · 2021→2022: 10 · 2022→2023: 4 · 2023→2024: 3 · 2024→2025: 6 → average 7.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7.3 × 2.66 = 19.4. Upper limit −191.9, lower limit −230.7.

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.