Ruby Bridges 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 5.

All students

3rd The average 3rd grader meets the grade 3 bar. 2437 vs. 2436.
4th The average 4th grader scores 30 points under the grade 4 bar. 2455 vs. 2485.
5th The average 5th grader scores just under the grade 4 bar. 2480 vs. 2485. The 5th-grade bar is 2528.

Students fluent in English

Math with English out of the way. Includes students who have only ever spoken English.

Grade bars 3rd 56 students Meets the grade 3 bar. 4th 61 students 30 points under the grade 4 bar. 5th 47 students 30 points under the grade 5 bar.

English learners

Students leave this group as they become fluent, so its average stays low even where they learn well.

Grade bars 3rd 13 students 32 points under the grade 3 bar. 4th 16 students 29 points under the grade 4 bar. 5th 11 students 37 points under the grade 3 bar.

the group's average that grade's own bar the distance between

2026 results. "Meets standard" is the state's mark for being on track for that grade. The state leaves out any group of ten students or fewer, so a grade may be missing from the charts.

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	251	2408.0	− 2436	−28	× 83 / 291	−8
4	252	2460.1	− 2485	−24.9	× 108 / 291	−9.2
5	255	2477.4	− 2528	−50.6	× 100 / 291	−17.4
Sum, rounded to a whole point						−35

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	209	2396.3	− 2436	−39.7	× 106 / 289	−14.6
4	210	2442.8	− 2485	−42.2	× 81 / 289	−11.8
5	212	2474.8	− 2528	−53.2	× 102 / 289	−18.8
Sum, rounded to a whole point						−45

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	210	2391.5	− 2436	−44.5	× 79 / 244	−14.4
4	213	2424.8	− 2485	−60.2	× 99 / 244	−24.4
5	215	2475.7	− 2528	−52.3	× 66 / 244	−14.1
Sum, rounded to a whole point						−53

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	230	2397.0	− 2436	−39	× 64 / 236	−10.6
4	233	2430.1	− 2485	−54.9	× 79 / 236	−18.4
5	234	2469.7	− 2528	−58.3	× 93 / 236	−23
Sum, rounded to a whole point						−52

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	258	2420.0	− 2436	−16	× 72 / 212	−5.4
4	259	2429.4	− 2485	−55.6	× 60 / 212	−15.7
5	260	2457.8	− 2528	−70.2	× 80 / 212	−26.5
Sum, rounded to a whole point						−48

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	262	2412.8	− 2436	−23.2	× 80 / 198	−9.4
4	263	2414.0	− 2485	−71	× 58 / 198	−20.8
5	264	2436.3	− 2528	−91.7	× 60 / 198	−27.8
Sum, rounded to a whole point						−58

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	264	2434.4	− 2436	−1.6	× 59 / 201	−0.5
4	265	2455.1	− 2485	−29.9	× 79 / 201	−11.8
5	266	2438.0	− 2528	−90	× 63 / 201	−28.2
Sum, rounded to a whole point						−40

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	264	2432.0	− 2436	−4	× 47 / 190	−1
4	265	2437.1	− 2485	−47.9	× 63 / 190	−15.9
5	266	2464.9	− 2528	−63.1	× 80 / 190	−26.6
Sum, rounded to a whole point						−43

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	264	2431.0	− 2436	−5	× 73 / 192	−1.9
4	265	2454.6	− 2485	−30.4	× 56 / 192	−8.9
5	266	2471.7	− 2528	−56.3	× 63 / 192	−18.5
Sum, rounded to a whole point						−29

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	266	2436.5	− 2436	0.5	× 69 / 204	0.2
4	267	2455.4	− 2485	−29.6	× 77 / 204	−11.2
5	268	2479.6	− 2528	−48.4	× 58 / 204	−13.8
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. −35, −45, −53, −52, −48, −58, −40, −43, −29, −25 → −42.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 10 · 2016→2017: 8 · 2017→2018: 1 · 2018→2019: 4 · 2019→2022: 10 · 2022→2023: 18 · 2023→2024: 3 · 2024→2025: 14 · 2025→2026: 4 → 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 −21.5, lower limit −64.1.

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.