John B. Riebli Elementary: math

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.

Measured against the grade bars

The state's math test uses one scale for every grade, so a score means the same thing in grade 3 as in grade 6.

3rd The average 3rd grader scores 19 points under the grade 3 bar. 2417 vs. 2436.
4th The average 4th grader scores 25 points under the grade 4 bar. 2460 vs. 2485.
5th The average 5th grader scores 35 points under the grade 5 bar. 2493 vs. 2528.
6th The average 6th grader scores 17 points under the grade 5 bar. 2511 vs. 2528. The 6th-grade bar is 2552.

2026 results. "Meets standard" is the state's mark for being on track for that grade.

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	94,477	2426.4	− 2436	−9.6	× 68 / 268	−2.4
4	94,478	2459.9	− 2485	−25.1	× 89 / 268	−8.3
5	94,481	2471.8	− 2528	−56.2	× 52 / 268	−10.9
6	94,482	2536.7	− 2552	−15.3	× 59 / 268	−3.4
Sum, rounded to a whole point						−25

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,724	2444.8	− 2436	8.8	× 68 / 260	2.3
4	87,726	2475.1	− 2485	−9.9	× 62 / 260	−2.4
5	87,728	2527.7	− 2528	−0.3	× 82 / 260	−0.1
6	87,730	2544.2	− 2552	−7.8	× 48 / 260	−1.4
Sum, rounded to a whole point						−2

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,247	2440.1	− 2436	4.1	× 81 / 276	1.2
4	90,248	2475.3	− 2485	−9.7	× 69 / 276	−2.4
5	90,251	2502.3	− 2528	−25.7	× 57 / 276	−5.3
6	90,252	2549.0	− 2552	−3	× 69 / 276	−0.8
Sum, rounded to a whole point						−7

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,452	2432.9	− 2436	−3.1	× 62 / 248	−0.8
4	90,453	2473.9	− 2485	−11.1	× 70 / 248	−3.1
5	90,456	2503.0	− 2528	−25	× 66 / 248	−6.7
6	90,457	2534.6	− 2552	−17.4	× 50 / 248	−3.5
Sum, rounded to a whole point						−14

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,072	2413.8	− 2436	−22.2	× 64 / 249	−5.7
4	91,073	2483.6	− 2485	−1.4	× 54 / 249	−0.3
5	91,074	2471.7	− 2528	−56.3	× 74 / 249	−16.7
6	91,075	2532.8	− 2552	−19.2	× 57 / 249	−4.4
Sum, rounded to a whole point						−27

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,138	2415.4	− 2436	−20.6	× 51 / 201	−5.2
4	89,139	2457.4	− 2485	−27.6	× 52 / 201	−7.1
5	89,140	2468.8	− 2528	−59.2	× 58 / 201	−17.1
6	89,141	2510.3	− 2552	−41.7	× 40 / 201	−8.3
Sum, rounded to a whole point						−38

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,326	2429.0	− 2436	−7	× 59 / 217	−1.9
4	91,327	2457.0	− 2485	−28	× 56 / 217	−7.2
5	91,328	2478.8	− 2528	−49.2	× 52 / 217	−11.8
6	91,329	2501.6	− 2552	−50.4	× 50 / 217	−11.6
Sum, rounded to a whole point						−33

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,222	2400.1	− 2436	−35.9	× 39 / 209	−6.7
4	91,223	2449.9	− 2485	−35.1	× 61 / 209	−10.2
5	91,224	2473.0	− 2528	−55	× 56 / 209	−14.7
6	91,225	2499.5	− 2552	−52.5	× 53 / 209	−13.3
Sum, rounded to a whole point						−45

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,167	2439.6	− 2436	3.6	× 53 / 198	1
4	91,168	2445.1	− 2485	−39.9	× 41 / 198	−8.3
5	91,169	2474.7	− 2528	−53.3	× 58 / 198	−15.6
6	91,170	2523.9	− 2552	−28.1	× 46 / 198	−6.5
Sum, rounded to a whole point						−29

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,867	2414.7	− 2436	−21.3	× 59 / 200	−6.3
4	90,868	2471.2	− 2485	−13.8	× 50 / 200	−3.5
5	90,869	2450.9	− 2528	−77.1	× 43 / 200	−16.6
6	90,870	2522.7	− 2552	−29.3	× 48 / 200	−7
Sum, rounded to a whole point						−33

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,522	2416.6	− 2436	−19.4	× 49 / 198	−4.8
4	90,523	2459.6	− 2485	−25.4	× 56 / 198	−7.2
5	90,524	2493.4	− 2528	−34.6	× 50 / 198	−8.7
6	90,525	2510.8	− 2552	−41.2	× 43 / 198	−8.9
Sum, rounded to a whole point						−30

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −25, −2, −7, −14, −27, −38, −33, −45, −29, −33, −30 → −25.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 23 · 2016→2017: 5 · 2017→2018: 7 · 2018→2019: 13 · 2019→2021: 11 · 2021→2022: 5 · 2022→2023: 12 · 2023→2024: 16 · 2024→2025: 4 · 2025→2026: 3 → average 9.9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.9 × 2.66 = 26.3. Upper limit 0.6, lower limit −52.

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.