Mar Vista 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	90,177	2421.8	− 2432	−10.2	× 57 / 246	−2.4
4	90,180	2485.8	− 2473	12.8	× 69 / 246	3.6
5	90,181	2543.2	− 2502	41.2	× 56 / 246	9.4
6	90,184	2548.5	− 2531	17.5	× 64 / 246	4.6
Sum, rounded to a whole point						15

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	83,656	2424.2	− 2432	−7.8	× 69 / 246	−2.2
4	83,657	2461.6	− 2473	−11.4	× 57 / 246	−2.6
5	83,659	2520.1	− 2502	18.1	× 69 / 246	5.1
6	83,661	2576.0	− 2531	45	× 51 / 246	9.3
Sum, rounded to a whole point						10

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	85,971	2417.0	− 2432	−15	× 68 / 266	−3.8
4	85,974	2483.2	− 2473	10.2	× 68 / 266	2.6
5	85,975	2475.9	− 2502	−26.1	× 56 / 266	−5.5
6	85,977	2551.4	− 2531	20.4	× 74 / 266	5.7
Sum, rounded to a whole point						−1

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,202	2434.0	− 2432	2	× 55 / 235	0.5
4	86,205	2438.9	− 2473	−34.1	× 66 / 235	−9.6
5	86,206	2511.2	− 2502	9.2	× 61 / 235	2.4
6	86,209	2515.1	− 2531	−15.9	× 53 / 235	−3.6
Sum, rounded to a whole point						−10

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,795	2396.4	− 2432	−35.6	× 55 / 231	−8.5
4	86,796	2474.8	− 2473	1.8	× 51 / 231	0.4
5	86,797	2470.7	− 2502	−31.3	× 61 / 231	−8.3
6	86,798	2546.9	− 2531	15.9	× 64 / 231	4.4
Sum, rounded to a whole point						−12

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,064	2404.1	− 2432	−27.9	× 46 / 214	−6
4	87,065	2399.7	− 2473	−73.3	× 59 / 214	−20.2
5	87,066	2517.0	− 2502	15	× 61 / 214	4.3
6	87,067	2501.3	− 2531	−29.7	× 48 / 214	−6.7
Sum, rounded to a whole point						−29

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,988	2387.1	− 2432	−44.9	× 43 / 187	−10.3
4	86,989	2446.2	− 2473	−26.8	× 43 / 187	−6.2
5	86,990	2439.4	− 2502	−62.6	× 53 / 187	−17.7
6	86,991	2546.2	− 2531	15.2	× 48 / 187	3.9
Sum, rounded to a whole point						−30

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,960	2401.8	− 2432	−30.2	× 40 / 166	−7.3
4	86,961	2411.7	− 2473	−61.3	× 38 / 166	−14
5	86,962	2473.3	− 2502	−28.7	× 43 / 166	−7.4
6	86,963	2500.2	− 2531	−30.8	× 45 / 166	−8.3
Sum, rounded to a whole point						−37

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,642	2402.9	− 2432	−29.1	× 39 / 147	−7.7
4	86,643	2419.5	− 2473	−53.5	× 36 / 147	−13.1
5	86,644	2467.5	− 2502	−34.5	× 34 / 147	−8
6	86,645	2544.8	− 2531	13.8	× 38 / 147	3.6
Sum, rounded to a whole point						−25

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 15, 10, −1, −10, −12, −29, −30, −37, −25 → −13.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 5 · 2016→2017: 11 · 2017→2018: 9 · 2018→2019: 2 · 2019→2022: 17 · 2022→2023: 1 · 2023→2024: 7 · 2024→2025: 12 → average 8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8 × 2.66 = 21.3. Upper limit 8.1, lower limit −34.5.

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.