La Patera 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	84,910	2379.5	− 2432	−52.5	× 58 / 244	−12.5
4	84,911	2426.7	− 2473	−46.3	× 60 / 244	−11.4
5	84,914	2463.0	− 2502	−39	× 51 / 244	−8.2
6	84,915	2499.4	− 2531	−31.6	× 75 / 244	−9.7
Sum, rounded to a whole point						−42

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	78,728	2410.4	− 2432	−21.6	× 64 / 245	−5.6
4	78,731	2445.9	− 2473	−27.1	× 64 / 245	−7.1
5	78,733	2493.9	− 2502	−8.1	× 62 / 245	−2
6	78,735	2495.2	− 2531	−35.8	× 55 / 245	−8
Sum, rounded to a whole point						−23

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	80,884	2398.4	− 2432	−33.6	× 50 / 231	−7.3
4	80,886	2441.6	− 2473	−31.4	× 59 / 231	−8
5	80,888	2498.1	− 2502	−3.9	× 63 / 231	−1.1
6	80,889	2536.4	− 2531	5.4	× 59 / 231	1.4
Sum, rounded to a whole point						−15

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,037	2412.3	− 2432	−19.7	× 51 / 217	−4.6
4	81,038	2446.4	− 2473	−26.6	× 50 / 217	−6.1
5	81,041	2516.0	− 2502	14	× 57 / 217	3.7
6	81,042	2541.0	− 2531	10	× 59 / 217	2.7
Sum, rounded to a whole point						−4

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,559	2430.4	− 2432	−1.6	× 50 / 205	−0.4
4	81,560	2461.4	− 2473	−11.6	× 52 / 205	−2.9
5	81,561	2497.2	− 2502	−4.8	× 46 / 205	−1.1
6	81,562	2550.4	− 2531	19.4	× 57 / 205	5.4
Sum, rounded to a whole point						1

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,780	2392.5	− 2432	−39.5	× 55 / 216	−10.1
4	81,781	2475.2	− 2473	2.2	× 61 / 216	0.6
5	81,782	2510.1	− 2502	8.1	× 48 / 216	1.8
6	81,783	2571.1	− 2531	40.1	× 52 / 216	9.7
Sum, rounded to a whole point						2

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,744	2446.3	− 2432	14.3	× 46 / 216	3
4	81,745	2448.5	− 2473	−24.5	× 57 / 216	−6.5
5	81,746	2523.3	− 2502	21.3	× 64 / 216	6.3
6	81,747	2565.7	− 2531	34.7	× 49 / 216	7.9
Sum, rounded to a whole point						11

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,756	2447.8	− 2432	15.8	× 45 / 209	3.4
4	81,757	2488.2	− 2473	15.2	× 49 / 209	3.6
5	81,758	2513.7	− 2502	11.7	× 55 / 209	3.1
6	81,759	2557.4	− 2531	26.4	× 60 / 209	7.6
Sum, rounded to a whole point						18

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,424	2415.4	− 2432	−16.6	× 53 / 209	−4.2
4	81,425	2467.5	− 2473	−5.5	× 44 / 209	−1.2
5	81,426	2500.9	− 2502	−1.1	× 53 / 209	−0.3
6	81,427	2543.3	− 2531	12.3	× 59 / 209	3.5
Sum, rounded to a whole point						−2

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −42, −23, −15, −4, 1, 2, 11, 18, −2 → −6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 19 · 2016→2017: 8 · 2017→2018: 11 · 2018→2019: 5 · 2019→2022: 1 · 2022→2023: 9 · 2023→2024: 7 · 2024→2025: 20 → average 10
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10 × 2.66 = 26.6. Upper limit 20.6, lower limit −32.6.

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.