Kipp Bridge 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
5	2,431	2462.1	− 2528	−65.9	× 75 / 326	−15.2
6	2,432	2512.6	− 2552	−39.4	× 91 / 326	−11
7	2,435	2544.4	− 2567	−22.6	× 85 / 326	−5.9
8	2,436	2557.5	− 2586	−28.5	× 75 / 326	−6.6
Sum, rounded to a whole point						−39

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	2,112	2444.5	− 2528	−83.5	× 68 / 298	−19.1
6	2,114	2487.3	− 2552	−64.7	× 82 / 298	−17.8
7	2,116	2536.2	− 2567	−30.8	× 76 / 298	−7.9
8	2,119	2617.6	− 2586	31.6	× 72 / 298	7.6
Sum, rounded to a whole point						−37

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	2,171	2398.0	− 2436	−38	× 49 / 380	−4.9
4	2,172	2411.7	− 2485	−73.3	× 58 / 380	−11.2
5	2,175	2429.7	− 2528	−98.3	× 74 / 380	−19.1
6	2,176	2477.0	− 2552	−75	× 75 / 380	−14.8
7	2,178	2509.1	− 2567	−57.9	× 56 / 380	−8.5
8	2,180	2530.1	− 2586	−55.9	× 68 / 380	−10
Sum, rounded to a whole point						−69

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	2,160	2428.9	− 2436	−7.1	× 47 / 338	−1
4	2,162	2425.8	− 2485	−59.2	× 49 / 338	−8.6
5	2,165	2458.5	− 2528	−69.5	× 74 / 338	−15.2
6	2,166	2457.6	− 2552	−94.4	× 71 / 338	−19.8
7	2,168	2500.0	− 2567	−67	× 59 / 338	−11.7
8	2,170	2508.0	− 2586	−78	× 38 / 338	−8.8
Sum, rounded to a whole point						−65

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	2,173	2404.0	− 2436	−32	× 44 / 336	−4.2
4	2,174	2446.4	− 2485	−38.6	× 52 / 336	−6
5	2,175	2467.1	− 2528	−60.9	× 59 / 336	−10.7
6	2,176	2466.7	− 2552	−85.3	× 70 / 336	−17.8
7	2,177	2506.6	− 2567	−60.4	× 62 / 336	−11.1
8	2,178	2558.3	− 2586	−27.7	× 49 / 336	−4
Sum, rounded to a whole point						−54

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	2,077	2371.0	− 2436	−65	× 48 / 330	−9.5
4	2,078	2393.9	− 2485	−91.1	× 54 / 330	−14.9
5	2,079	2438.4	− 2528	−89.6	× 46 / 330	−12.5
6	2,080	2482.1	− 2552	−69.9	× 70 / 330	−14.8
7	2,081	2486.2	− 2567	−80.8	× 60 / 330	−14.7
8	2,082	2480.9	− 2586	−105.1	× 52 / 330	−16.6
Sum, rounded to a whole point						−83

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	2,139	2397.8	− 2436	−38.2	× 48 / 344	−5.3
4	2,140	2413.6	− 2485	−71.4	× 48 / 344	−10
5	2,141	2464.3	− 2528	−63.7	× 64 / 344	−11.9
6	2,142	2480.3	− 2552	−71.7	× 56 / 344	−11.7
7	2,143	2508.1	− 2567	−58.9	× 63 / 344	−10.8
8	2,144	2498.6	− 2586	−87.4	× 65 / 344	−16.5
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	2,091	2392.8	− 2436	−43.2	× 48 / 325	−6.4
4	2,092	2406.1	− 2485	−78.9	× 46 / 325	−11.2
5	2,093	2475.8	− 2528	−52.2	× 54 / 325	−8.7
6	2,094	2473.3	− 2552	−78.7	× 58 / 325	−14
7	2,095	2518.5	− 2567	−48.5	× 55 / 325	−8.2
8	2,096	2537.4	− 2586	−48.6	× 64 / 325	−9.6
Sum, rounded to a whole point						−58

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	2,059	2404.2	− 2436	−31.8	× 45 / 301	−4.8
4	2,060	2443.7	− 2485	−41.3	× 45 / 301	−6.2
5	2,061	2450.8	− 2528	−77.2	× 46 / 301	−11.8
6	2,062	2496.3	− 2552	−55.7	× 60 / 301	−11.1
7	2,063	2511.4	− 2567	−55.6	× 56 / 301	−10.3
8	2,064	2514.4	− 2586	−71.6	× 49 / 301	−11.7
Sum, rounded to a whole point						−56

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	2,033	2408.9	− 2436	−27.1	× 46 / 325	−3.8
4	2,034	2448.1	− 2485	−36.9	× 48 / 325	−5.4
5	2,035	2434.5	− 2528	−93.5	× 51 / 325	−14.7
6	2,036	2462.4	− 2552	−89.6	× 64 / 325	−17.6
7	2,037	2518.5	− 2567	−48.5	× 57 / 325	−8.5
8	2,038	2509.9	− 2586	−76.1	× 59 / 325	−13.8
Sum, rounded to a whole point						−64

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −39, −37, −69, −65, −54, −83, −66, −58, −56, −64 → −59.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 2 · 2016→2017: 32 · 2017→2018: 4 · 2018→2019: 11 · 2019→2021: 29 · 2021→2022: 17 · 2022→2023: 8 · 2023→2024: 2 · 2024→2025: 8 → average 12.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 12.6 × 2.66 = 33.5. Upper limit −25.6, lower limit −92.6.

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.