Savannah 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	37,047	2393.8	− 2432	−38.2	× 71 / 319	−8.5
4	37,049	2448.4	− 2473	−24.6	× 65 / 319	−5
5	37,051	2477.6	− 2502	−24.4	× 88 / 319	−6.7
6	37,053	2520.5	− 2531	−10.5	× 95 / 319	−3.1
Sum, rounded to a whole point						−23

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	34,494	2392.9	− 2432	−39.1	× 67 / 286	−9.2
4	34,497	2459.6	− 2473	−13.4	× 65 / 286	−3
5	34,499	2512.8	− 2502	10.8	× 65 / 286	2.5
6	34,501	2537.1	− 2531	6.1	× 89 / 286	1.9
Sum, rounded to a whole point						−8

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,112	2424.6	− 2432	−7.4	× 51 / 261	−1.4
4	35,114	2464.1	− 2473	−8.9	× 73 / 261	−2.5
5	35,117	2501.2	− 2502	−0.8	× 67 / 261	−0.2
6	35,119	2540.9	− 2531	9.9	× 70 / 261	2.7
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	35,124	2417.4	− 2432	−14.6	× 60 / 247	−3.5
4	35,126	2483.2	− 2473	10.2	× 49 / 247	2
5	35,128	2499.1	− 2502	−2.9	× 70 / 247	−0.8
6	35,130	2553.2	− 2531	22.2	× 68 / 247	6.1
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	35,287	2445.8	− 2432	13.8	× 55 / 240	3.2
4	35,288	2470.0	− 2473	−3	× 59 / 240	−0.7
5	35,289	2552.8	− 2502	50.8	× 53 / 240	11.2
6	35,290	2526.8	− 2531	−4.2	× 73 / 240	−1.3
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	35,184	2374.1	− 2432	−57.9	× 76 / 222	−19.8
4	35,185	2472.2	− 2473	−0.8	× 47 / 222	−0.2
5	35,186	2483.8	− 2502	−18.2	× 44 / 222	−3.6
6	35,187	2530.9	− 2531	−0.1	× 55 / 222	0
Sum, rounded to a whole point						−24

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,215	2399.0	− 2432	−33	× 47 / 209	−7.4
4	35,216	2446.4	− 2473	−26.6	× 66 / 209	−8.4
5	35,217	2513.8	− 2502	11.8	× 49 / 209	2.8
6	35,218	2491.4	− 2531	−39.6	× 47 / 209	−8.9
Sum, rounded to a whole point						−22

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	35,065	2373.9	− 2432	−58.1	× 52 / 213	−14.2
4	35,066	2475.7	− 2473	2.7	× 46 / 213	0.6
5	35,067	2487.9	− 2502	−14.1	× 63 / 213	−4.2
6	35,068	2538.9	− 2531	7.9	× 52 / 213	1.9
Sum, rounded to a whole point						−16

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	34,918	2369.3	− 2432	−62.7	× 50 / 203	−15.4
4	34,919	2466.4	− 2473	−6.6	× 46 / 203	−1.5
5	34,920	2518.2	− 2502	16.2	× 44 / 203	3.5
6	34,921	2530.4	− 2531	−0.6	× 63 / 203	−0.2
Sum, rounded to a whole point						−14

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −23, −8, −1, 4, 12, −24, −22, −16, −14 → −10.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 15 · 2016→2017: 7 · 2017→2018: 5 · 2018→2019: 8 · 2019→2022: 36 · 2022→2023: 2 · 2023→2024: 6 · 2024→2025: 2 → average 10.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.1 × 2.66 = 26.9. Upper limit 16.7, lower limit −37.1.

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.