Leonardo Da Vinci Health Sciences Charter: 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	70,529	2369.9	− 2432	−62.1	× 47 / 162	−18
4	70,530	2427.1	− 2473	−45.9	× 49 / 162	−13.9
5	70,533	2471.8	− 2502	−30.2	× 44 / 162	−8.2
6	70,534	2512.9	− 2531	−18.1	× 22 / 162	−2.5
Sum, rounded to a whole point						−43

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,362	2386.9	− 2432	−45.1	× 47 / 177	−12
4	65,363	2437.2	− 2473	−35.8	× 48 / 177	−9.7
5	65,365	2470.8	− 2502	−31.2	× 44 / 177	−7.8
6	65,368	2530.2	− 2531	−0.8	× 38 / 177	−0.2
Sum, rounded to a whole point						−30

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,169	2381.2	− 2432	−50.8	× 43 / 175	−12.5
4	67,172	2432.4	− 2473	−40.6	× 48 / 175	−11.1
5	67,174	2501.0	− 2502	−1	× 41 / 175	−0.2
6	67,176	2528.0	− 2531	−3	× 43 / 175	−0.7
Sum, rounded to a whole point						−25

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,266	2394.8	− 2432	−37.2	× 48 / 175	−10.2
4	67,267	2469.8	− 2473	−3.2	× 40 / 175	−0.7
5	67,270	2503.4	− 2502	1.4	× 46 / 175	0.4
6	67,271	2547.7	− 2531	16.7	× 41 / 175	3.9
Sum, rounded to a whole point						−7

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,760	2417.8	− 2432	−14.2	× 46 / 164	−4
4	67,761	2445.5	− 2473	−27.5	× 40 / 164	−6.7
5	67,762	2514.0	− 2502	12	× 40 / 164	2.9
6	67,763	2544.9	− 2531	13.9	× 38 / 164	3.2
Sum, rounded to a whole point						−5

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	66,361	2393.0	− 2432	−39	× 35 / 155	−8.8
4	66,362	2425.7	− 2473	−47.3	× 41 / 155	−12.5
5	66,363	2483.6	− 2502	−18.4	× 37 / 155	−4.4
6	66,364	2488.0	− 2531	−43	× 42 / 155	−11.7
Sum, rounded to a whole point						−37

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,900	2403.8	− 2432	−28.2	× 31 / 149	−5.9
4	67,901	2421.5	− 2473	−51.5	× 41 / 149	−14.2
5	67,902	2530.8	− 2502	28.8	× 44 / 149	8.5
6	67,903	2520.5	− 2531	−10.5	× 33 / 149	−2.3
Sum, rounded to a whole point						−14

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,910	2367.6	− 2432	−64.4	× 28 / 138	−13.1
4	67,911	2429.3	− 2473	−43.7	× 29 / 138	−9.2
5	67,912	2438.5	− 2502	−63.5	× 42 / 138	−19.3
6	67,913	2570.8	− 2531	39.8	× 39 / 138	11.2
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	67,904	2371.9	− 2432	−60.1	× 47 / 143	−19.8
4	67,905	2408.2	− 2473	−64.8	× 33 / 143	−15
5	67,906	2457.9	− 2502	−44.1	× 25 / 143	−7.7
6	67,907	2515.7	− 2531	−15.3	× 38 / 143	−4.1
Sum, rounded to a whole point						−46

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,662	2366.2	− 2432	−65.8	× 34 / 130	−17.2
4	67,663	2464.8	− 2473	−8.2	× 45 / 130	−2.8
5	67,664	2454.8	− 2502	−47.2	× 30 / 130	−10.9
6	67,665	2566.5	− 2531	35.5	× 21 / 130	5.7
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. −43, −30, −25, −7, −5, −37, −14, −30, −46, −25 → −26.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 13 · 2016→2017: 5 · 2017→2018: 18 · 2018→2019: 2 · 2019→2021: 32 · 2021→2022: 23 · 2022→2023: 16 · 2023→2024: 16 · 2024→2025: 21 → average 16.2
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 16.2 × 2.66 = 43.1. Upper limit 16.9, lower limit −69.3.

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.