River Bluff 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.

All students

3rd The average 3rd grader meets the grade 3 bar. 2448 vs. 2436.
4th The average 4th grader scores just under the grade 4 bar. 2478 vs. 2485.
5th The average 5th grader meets the grade 5 bar. 2544 vs. 2528.
6th The average 6th grader meets the grade 6 bar. 2579 vs. 2552.

Students fluent in English

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

Grade bars 3rd 63 students Meets the grade 3 bar. 4th 79 students Meets the grade 4 bar.

English learners

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

Grade bars 3rd 11 students 41 points under the grade 3 bar. 4th 15 students 22 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	12,504	2437.1	− 2436	1.1	× 111 / 508	0.2
4	12,505	2466.3	− 2485	−18.7	× 137 / 508	−5
5	12,507	2467.3	− 2528	−60.7	× 134 / 508	−16
6	12,510	2510.8	− 2552	−41.2	× 126 / 508	−10.2
Sum, rounded to a whole point						−31

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	11,531	2454.9	− 2436	18.9	× 140 / 533	5
4	11,532	2473.8	− 2485	−11.2	× 123 / 533	−2.6
5	11,534	2504.6	− 2528	−23.4	× 136 / 533	−6
6	11,536	2531.8	− 2552	−20.2	× 134 / 533	−5.1
Sum, rounded to a whole point						−9

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	11,863	2447.1	− 2436	11.1	× 108 / 471	2.5
4	11,865	2498.0	− 2485	13	× 130 / 471	3.6
5	11,866	2491.1	− 2528	−36.9	× 104 / 471	−8.1
6	11,868	2566.9	− 2552	14.9	× 129 / 471	4.1
Sum, rounded to a whole point						2

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	11,899	2467.0	− 2436	31	× 106 / 453	7.3
4	11,900	2486.5	− 2485	1.5	× 98 / 453	0.3
5	11,903	2512.4	− 2528	−15.6	× 134 / 453	−4.6
6	11,904	2545.7	− 2552	−6.3	× 115 / 453	−1.6
Sum, rounded to a whole point						1

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	11,991	2449.5	− 2436	13.5	× 107 / 451	3.2
4	11,992	2486.0	− 2485	1	× 105 / 451	0.2
5	11,993	2513.5	− 2528	−14.5	× 103 / 451	−3.3
6	11,994	2560.4	− 2552	8.4	× 136 / 451	2.5
Sum, rounded to a whole point						3

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	11,982	2438.9	− 2436	2.9	× 103 / 389	0.8
4	11,983	2469.3	− 2485	−15.7	× 98 / 389	−4
5	11,984	2494.3	− 2528	−33.7	× 95 / 389	−8.2
6	11,985	2560.8	− 2552	8.8	× 93 / 389	2.1
Sum, rounded to a whole point						−9

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	11,965	2425.1	− 2436	−10.9	× 107 / 413	−2.8
4	11,966	2470.1	− 2485	−14.9	× 100 / 413	−3.6
5	11,967	2538.1	− 2528	10.1	× 101 / 413	2.5
6	11,968	2545.2	− 2552	−6.8	× 105 / 413	−1.7
Sum, rounded to a whole point						−6

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	11,928	2424.5	− 2436	−11.5	× 87 / 387	−2.6
4	11,929	2469.0	− 2485	−16	× 103 / 387	−4.3
5	11,930	2520.2	− 2528	−7.8	× 93 / 387	−1.9
6	11,931	2587.3	− 2552	35.3	× 104 / 387	9.5
Sum, rounded to a whole point						1

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	11,871	2425.8	− 2436	−10.2	× 99 / 390	−2.6
4	11,872	2492.0	− 2485	7	× 89 / 390	1.6
5	11,873	2531.8	− 2528	3.8	× 99 / 390	1
6	11,874	2587.5	− 2552	35.5	× 103 / 390	9.4
Sum, rounded to a whole point						9

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	11,901	2448.0	− 2436	12	× 74 / 353	2.5
4	11,902	2477.5	− 2485	−7.5	× 94 / 353	−2
5	11,903	2544.1	− 2528	16.1	× 90 / 353	4.1
6	11,904	2579.1	− 2552	27.1	× 95 / 353	7.3
Sum, rounded to a whole point						12

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −31, −9, 2, 1, 3, −9, −6, 1, 9, 12 → −2.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 22 · 2016→2017: 11 · 2017→2018: 1 · 2018→2019: 2 · 2019→2022: 12 · 2022→2023: 3 · 2023→2024: 7 · 2024→2025: 8 · 2025→2026: 3 → 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 17.8, lower limit −23.2.

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.