Bay View Academy: 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.

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	45,286	2460.9	− 2436	24.9	× 48 / 194	6.2
4	45,287	2493.0	− 2485	8	× 58 / 194	2.4
5	45,290	2497.9	− 2528	−30.1	× 30 / 194	−4.7
6	45,291	2613.6	− 2552	61.6	× 30 / 194	9.5
7	45,294	2563.3	− 2567	−3.7	× 28 / 194	−0.5
Sum, rounded to a whole point						13

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,989	2447.7	− 2436	11.7	× 48 / 253	2.2
4	41,991	2510.2	− 2485	25.2	× 57 / 253	5.7
5	41,994	2532.9	− 2528	4.9	× 60 / 253	1.2
6	41,995	2550.7	− 2552	−1.3	× 30 / 253	−0.2
7	41,998	2616.0	− 2567	49	× 30 / 253	5.8
8	41,999	2574.2	− 2586	−11.8	× 28 / 253	−1.3
Sum, rounded to a whole point						13

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	43,030	2431.3	− 2436	−4.7	× 48 / 284	−0.8
4	43,033	2488.3	− 2485	3.3	× 58 / 284	0.7
5	43,035	2544.2	− 2528	16.2	× 60 / 284	3.4
6	43,036	2559.0	− 2552	7	× 60 / 284	1.5
7	43,039	2585.3	− 2567	18.3	× 30 / 284	1.9
8	43,040	2643.2	− 2586	57.2	× 28 / 284	5.6
Sum, rounded to a whole point						12

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	43,033	2427.2	− 2436	−8.8	× 47 / 314	−1.3
4	43,036	2476.0	− 2485	−9	× 60 / 314	−1.7
5	43,037	2521.4	− 2528	−6.6	× 61 / 314	−1.3
6	43,040	2547.8	− 2552	−4.2	× 58 / 314	−0.8
7	43,041	2581.7	− 2567	14.7	× 59 / 314	2.8
8	43,044	2600.3	− 2586	14.3	× 29 / 314	1.3
Sum, rounded to a whole point						−1

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	43,156	2417.2	− 2436	−18.8	× 50 / 346	−2.7
4	43,157	2506.5	− 2485	21.5	× 60 / 346	3.7
5	43,158	2492.2	− 2528	−35.8	× 60 / 346	−6.2
6	43,159	2528.9	− 2552	−23.1	× 61 / 346	−4.1
7	43,160	2563.1	− 2567	−3.9	× 56 / 346	−0.6
8	43,161	2573.5	− 2586	−12.5	× 59 / 346	−2.1
Sum, rounded to a whole point						−12

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	42,028	2373.8	− 2436	−62.2	× 40 / 257	−9.7
4	42,029	2452.4	− 2485	−32.6	× 46 / 257	−5.8
5	42,030	2454.3	− 2528	−73.7	× 35 / 257	−10
6	42,031	2477.0	− 2552	−75	× 45 / 257	−13.1
7	42,032	2538.2	− 2567	−28.8	× 45 / 257	−5
8	42,033	2580.4	− 2586	−5.6	× 46 / 257	−1
Sum, rounded to a whole point						−45

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	42,895	2409.3	− 2436	−26.7	× 51 / 323	−4.2
4	42,896	2406.5	− 2485	−78.5	× 57 / 323	−13.9
5	42,897	2453.4	− 2528	−74.6	× 54 / 323	−12.5
6	42,898	2478.9	− 2552	−73.1	× 57 / 323	−12.9
7	42,899	2525.3	− 2567	−41.7	× 53 / 323	−6.8
8	42,900	2488.2	− 2586	−97.8	× 51 / 323	−15.4
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	42,904	2437.3	− 2436	1.3	× 45 / 321	0.2
4	42,905	2456.0	− 2485	−29	× 57 / 321	−5.1
5	42,906	2457.8	− 2528	−70.2	× 57 / 321	−12.5
6	42,907	2512.1	− 2552	−39.9	× 54 / 321	−6.7
7	42,908	2522.2	− 2567	−44.8	× 53 / 321	−7.4
8	42,909	2543.3	− 2586	−42.7	× 55 / 321	−7.3
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	42,733	2418.1	− 2436	−17.9	× 52 / 319	−2.9
4	42,734	2454.0	− 2485	−31	× 45 / 319	−4.4
5	42,735	2501.2	− 2528	−26.8	× 55 / 319	−4.6
6	42,736	2484.3	− 2552	−67.7	× 59 / 319	−12.5
7	42,737	2520.6	− 2567	−46.4	× 53 / 319	−7.7
8	42,738	2526.3	− 2586	−59.7	× 55 / 319	−10.3
Sum, rounded to a whole point						−42

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	42,484	2416.4	− 2436	−19.6	× 52 / 306	−3.3
4	42,485	2432.7	− 2485	−52.3	× 53 / 306	−9.1
5	42,486	2484.2	− 2528	−43.8	× 50 / 306	−7.2
6	42,487	2521.5	− 2552	−30.5	× 46 / 306	−4.6
7	42,488	2482.2	− 2567	−84.8	× 55 / 306	−15.2
8	42,489	2539.4	− 2586	−46.6	× 50 / 306	−7.6
Sum, rounded to a whole point						−47

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 13, 13, 12, −1, −12, −45, −66, −39, −42, −47 → −21.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 0 · 2016→2017: 1 · 2017→2018: 13 · 2018→2019: 11 · 2019→2021: 33 · 2021→2022: 21 · 2022→2023: 27 · 2023→2024: 3 · 2024→2025: 5 → average 12.7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 12.7 × 2.66 = 33.8. Upper limit 12.4, lower limit −55.2.

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. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.