John B. Riebli 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	94,476	2413.7	− 2432	−18.3	× 68 / 268	−4.6
4	94,479	2453.1	− 2473	−19.9	× 89 / 268	−6.6
5	94,480	2484.4	− 2502	−17.6	× 52 / 268	−3.4
6	94,483	2539.4	− 2531	8.4	× 59 / 268	1.8
Sum, rounded to a whole point						−13

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,723	2423.3	− 2432	−8.7	× 68 / 260	−2.3
4	87,725	2457.5	− 2473	−15.5	× 62 / 260	−3.7
5	87,727	2514.6	− 2502	12.6	× 82 / 260	4
6	87,729	2537.5	− 2531	6.5	× 48 / 260	1.2
Sum, rounded to a whole point						−1

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,246	2423.0	− 2432	−9	× 81 / 276	−2.6
4	90,249	2448.7	− 2473	−24.3	× 69 / 276	−6.1
5	90,250	2478.4	− 2502	−23.6	× 57 / 276	−4.9
6	90,253	2537.9	− 2531	6.9	× 69 / 276	1.7
Sum, rounded to a whole point						−12

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,451	2415.7	− 2432	−16.3	× 62 / 248	−4.1
4	90,454	2462.3	− 2473	−10.7	× 70 / 248	−3
5	90,455	2493.1	− 2502	−8.9	× 66 / 248	−2.4
6	90,458	2522.8	− 2531	−8.2	× 50 / 248	−1.7
Sum, rounded to a whole point						−11

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,067	2387.8	− 2432	−44.2	× 64 / 248	−11.4
4	91,068	2479.2	− 2473	6.2	× 54 / 248	1.4
5	91,069	2457.2	− 2502	−44.8	× 74 / 248	−13.4
6	91,070	2533.6	− 2531	2.6	× 56 / 248	0.6
Sum, rounded to a whole point						−23

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,133	2409.0	− 2432	−23	× 50 / 210	−5.5
4	89,134	2447.9	− 2473	−25.1	× 62 / 210	−7.4
5	89,135	2473.5	− 2502	−28.5	× 60 / 210	−8.1
6	89,136	2521.9	− 2531	−9.1	× 38 / 210	−1.6
Sum, rounded to a whole point						−23

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,321	2426.6	− 2432	−5.4	× 58 / 220	−1.4
4	91,322	2454.4	− 2473	−18.6	× 59 / 220	−5
5	91,323	2461.5	− 2502	−40.5	× 52 / 220	−9.6
6	91,324	2493.9	− 2531	−37.1	× 51 / 220	−8.6
Sum, rounded to a whole point						−25

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,217	2394.0	− 2432	−38	× 39 / 209	−7.1
4	91,218	2456.2	− 2473	−16.8	× 61 / 209	−4.9
5	91,219	2487.5	− 2502	−14.5	× 56 / 209	−3.9
6	91,220	2484.5	− 2531	−46.5	× 53 / 209	−11.8
Sum, rounded to a whole point						−28

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,162	2445.0	− 2432	13	× 52 / 198	3.4
4	91,163	2441.2	− 2473	−31.8	× 42 / 198	−6.7
5	91,164	2484.0	− 2502	−18	× 57 / 198	−5.2
6	91,165	2523.7	− 2531	−7.3	× 47 / 198	−1.7
Sum, rounded to a whole point						−10

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,862	2435.4	− 2432	3.4	× 59 / 200	1
4	90,863	2474.6	− 2473	1.6	× 50 / 200	0.4
5	90,864	2480.9	− 2502	−21.1	× 43 / 200	−4.5
6	90,865	2545.9	− 2531	14.9	× 48 / 200	3.6
Sum, rounded to a whole point						0

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −13, −1, −12, −11, −23, −23, −25, −28, −10, 0 → −14.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 12 · 2016→2017: 11 · 2017→2018: 1 · 2018→2019: 12 · 2019→2021: 0 · 2021→2022: 2 · 2022→2023: 3 · 2023→2024: 18 · 2024→2025: 10 → average 7.7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7.7 × 2.66 = 20.5. Upper limit 5.9, lower limit −35.1.

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.