North Park Elementary: english

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	68,318	2389.2	− 2432	−42.8	× 87 / 324	−11.5
4	68,321	2394.1	− 2473	−78.9	× 78 / 324	−19
5	68,322	2472.4	− 2502	−29.6	× 81 / 324	−7.4
6	68,325	2500.9	− 2531	−30.1	× 78 / 324	−7.2
Sum, rounded to a whole point						−45

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	63,319	2380.7	− 2432	−51.3	× 63 / 285	−11.3
4	63,321	2436.6	− 2473	−36.4	× 83 / 285	−10.6
5	63,324	2448.9	− 2502	−53.1	× 75 / 285	−14
6	63,325	2517.4	− 2531	−13.6	× 64 / 285	−3.1
Sum, rounded to a whole point						−39

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,199	2401.0	− 2432	−31	× 66 / 266	−7.7
4	65,201	2462.9	− 2473	−10.1	× 69 / 266	−2.6
5	65,203	2498.9	− 2502	−3.1	× 60 / 266	−0.7
6	65,205	2493.3	− 2531	−37.7	× 71 / 266	−10.1
Sum, rounded to a whole point						−21

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,564	2430.1	− 2432	−1.9	× 79 / 287	−0.5
4	65,565	2452.0	− 2473	−21	× 71 / 287	−5.2
5	65,566	2514.1	− 2502	12.1	× 70 / 287	3
6	65,567	2510.0	− 2531	−21	× 67 / 287	−4.9
Sum, rounded to a whole point						−8

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,655	2403.1	− 2432	−28.9	× 56 / 245	−6.6
4	65,656	2452.6	− 2473	−20.4	× 67 / 245	−5.6
5	65,657	2505.2	− 2502	3.2	× 66 / 245	0.9
6	65,658	2509.2	− 2531	−21.8	× 56 / 245	−5
Sum, rounded to a whole point						−16

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,662	2393.8	− 2432	−38.2	× 71 / 257	−10.6
4	65,663	2431.5	− 2473	−41.5	× 59 / 257	−9.5
5	65,664	2471.0	− 2502	−31	× 72 / 257	−8.7
6	65,665	2484.1	− 2531	−46.9	× 55 / 257	−10
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	65,630	2415.8	− 2432	−16.2	× 76 / 256	−4.8
4	65,631	2430.1	− 2473	−42.9	× 62 / 256	−10.4
5	65,632	2493.7	− 2502	−8.3	× 60 / 256	−1.9
6	65,633	2481.6	− 2531	−49.4	× 58 / 256	−11.2
Sum, rounded to a whole point						−28

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,390	2415.7	− 2432	−16.3	× 73 / 252	−4.7
4	65,391	2454.5	− 2473	−18.5	× 75 / 252	−5.5
5	65,392	2496.6	− 2502	−5.4	× 62 / 252	−1.3
6	65,393	2497.7	− 2531	−33.3	× 42 / 252	−5.6
Sum, rounded to a whole point						−17

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −45, −39, −21, −8, −16, −39, −28, −17 → −26.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 6 · 2016→2018: 18 · 2018→2019: 13 · 2019→2022: 8 · 2022→2023: 23 · 2023→2024: 11 · 2024→2025: 11 → average 12.9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 12.9 × 2.66 = 34.3. Upper limit 7.7, lower limit −60.9.

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.