Pittman 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.

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	80,482	2377.4	− 2436	−58.6	× 80 / 401	−11.7
4	80,484	2445.3	− 2485	−39.7	× 56 / 401	−5.5
5	80,486	2413.9	− 2528	−114.1	× 83 / 401	−23.6
6	80,488	2480.7	− 2552	−71.3	× 58 / 401	−10.3
7	80,490	2472.7	− 2567	−94.3	× 62 / 401	−14.6
8	80,492	2506.7	− 2586	−79.3	× 62 / 401	−12.3
Sum, rounded to a whole point						−78

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	74,583	2385.2	− 2436	−50.8	× 79 / 391	−10.3
4	74,585	2428.7	− 2485	−56.3	× 80 / 391	−11.5
5	74,586	2433.4	− 2528	−94.6	× 53 / 391	−12.8
6	74,588	2431.8	− 2552	−120.2	× 75 / 391	−23.1
7	74,590	2487.6	− 2567	−79.4	× 54 / 391	−11
8	74,592	2458.3	− 2586	−127.7	× 50 / 391	−16.3
Sum, rounded to a whole point						−85

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	76,568	2403.3	− 2436	−32.7	× 76 / 389	−6.4
4	76,569	2442.8	− 2485	−42.2	× 76 / 389	−8.2
5	76,572	2444.2	− 2528	−83.8	× 70 / 389	−15.1
6	76,574	2455.3	− 2552	−96.7	× 52 / 389	−12.9
7	76,575	2474.8	− 2567	−92.2	× 64 / 389	−15.2
8	76,578	2504.1	− 2586	−81.9	× 51 / 389	−10.7
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	76,751	2392.2	− 2436	−43.8	× 80 / 407	−8.6
4	76,752	2438.3	− 2485	−46.7	× 72 / 407	−8.3
5	76,755	2449.6	− 2528	−78.4	× 70 / 407	−13.5
6	76,756	2469.9	− 2552	−82.1	× 76 / 407	−15.3
7	76,759	2494.0	− 2567	−73	× 52 / 407	−9.3
8	76,760	2480.8	− 2586	−105.2	× 57 / 407	−14.7
Sum, rounded to a whole point						−70

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,257	2407.5	− 2436	−28.5	× 89 / 441	−5.8
4	77,258	2416.9	− 2485	−68.1	× 83 / 441	−12.8
5	77,259	2464.3	− 2528	−63.7	× 73 / 441	−10.5
6	77,260	2476.5	− 2552	−75.5	× 65 / 441	−11.1
7	77,261	2478.1	− 2567	−88.9	× 77 / 441	−15.5
8	77,262	2477.3	− 2586	−108.7	× 54 / 441	−13.3
Sum, rounded to a whole point						−69

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,409	2361.0	− 2436	−75	× 87 / 471	−13.9
4	77,410	2417.8	− 2485	−67.2	× 82 / 471	−11.7
5	77,411	2438.4	− 2528	−89.6	× 86 / 471	−16.4
6	77,412	2457.0	− 2552	−95	× 84 / 471	−16.9
7	77,413	2434.6	− 2567	−132.4	× 71 / 471	−20
8	77,414	2458.0	− 2586	−128	× 61 / 471	−16.6
Sum, rounded to a whole point						−95

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,395	2384.7	− 2436	−51.3	× 79 / 451	−9
4	77,396	2387.6	− 2485	−97.4	× 84 / 451	−18.1
5	77,397	2472.6	− 2528	−55.4	× 78 / 451	−9.6
6	77,398	2480.5	− 2552	−71.5	× 74 / 451	−11.7
7	77,399	2459.9	− 2567	−107.1	× 75 / 451	−17.8
8	77,400	2437.0	− 2586	−149	× 61 / 451	−20.2
Sum, rounded to a whole point						−86

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,395	2378.8	− 2436	−57.2	× 73 / 435	−9.6
4	77,396	2420.8	− 2485	−64.2	× 78 / 435	−11.5
5	77,397	2441.8	− 2528	−86.2	× 75 / 435	−14.9
6	77,398	2496.1	− 2552	−55.9	× 65 / 435	−8.4
7	77,399	2512.2	− 2567	−54.8	× 68 / 435	−8.6
8	77,400	2480.4	− 2586	−105.6	× 76 / 435	−18.4
Sum, rounded to a whole point						−71

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	77,049	2395.8	− 2436	−40.2	× 61 / 401	−6.1
4	77,050	2422.8	− 2485	−62.2	× 66 / 401	−10.2
5	77,051	2463.8	− 2528	−64.2	× 67 / 401	−10.7
6	77,052	2446.5	− 2552	−105.5	× 75 / 401	−19.7
7	77,053	2526.2	− 2567	−40.8	× 66 / 401	−6.7
8	77,054	2531.1	− 2586	−54.9	× 66 / 401	−9
Sum, rounded to a whole point						−63

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −78, −85, −69, −70, −69, −95, −86, −71, −63 → −76.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 7 · 2016→2017: 16 · 2017→2018: 1 · 2018→2019: 1 · 2019→2022: 26 · 2022→2023: 9 · 2023→2024: 15 · 2024→2025: 8 → average 10.4
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.4 × 2.66 = 27.7. Upper limit −48.5, lower limit −103.9.

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.