Rio Bravo-Greeley 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
5	18,265	2451.9	− 2502	−50.1	× 115 / 415	−13.9
6	18,267	2457.1	− 2531	−73.9	× 70 / 415	−12.5
7	18,269	2523.6	− 2552	−28.4	× 118 / 415	−8.1
8	18,271	2534.2	− 2567	−32.8	× 112 / 415	−8.9
Sum, rounded to a whole point						−43

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	17,282	2509.0	− 2502	7	× 104 / 445	1.6
6	17,284	2517.3	− 2531	−13.7	× 124 / 445	−3.8
7	17,285	2516.1	− 2552	−35.9	× 107 / 445	−8.6
8	17,288	2585.8	− 2567	18.8	× 110 / 445	4.6
Sum, rounded to a whole point						−6

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	17,591	2480.0	− 2502	−22	× 121 / 462	−5.8
6	17,593	2528.9	− 2531	−2.1	× 105 / 462	−0.5
7	17,595	2511.8	− 2552	−40.2	× 121 / 462	−10.5
8	17,598	2533.1	− 2567	−33.9	× 115 / 462	−8.4
Sum, rounded to a whole point						−25

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	17,614	2483.4	− 2502	−18.6	× 125 / 490	−4.7
6	17,617	2520.4	− 2531	−10.6	× 128 / 490	−2.8
7	17,618	2535.0	− 2552	−17	× 115 / 490	−4
8	17,621	2567.0	− 2567	0	× 122 / 490	0
Sum, rounded to a whole point						−12

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	17,756	2490.4	− 2502	−11.6	× 120 / 510	−2.7
6	17,757	2513.9	− 2531	−17.1	× 130 / 510	−4.4
7	17,758	2567.1	− 2552	15.1	× 145 / 510	4.3
8	17,759	2579.3	− 2567	12.3	× 115 / 510	2.8
Sum, rounded to a whole point						0

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	17,356	2493.9	− 2502	−8.1	× 111 / 425	−2.1
6	17,357	2519.4	− 2531	−11.6	× 100 / 425	−2.7
7	17,358	2561.1	− 2552	9.1	× 96 / 425	2.1
8	17,359	2561.7	− 2567	−5.3	× 118 / 425	−1.5
Sum, rounded to a whole point						−4

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	17,812	2513.6	− 2502	11.6	× 105 / 428	2.8
6	17,813	2531.0	− 2531	0	× 106 / 428	0
7	17,814	2539.4	− 2552	−12.6	× 108 / 428	−3.2
8	17,815	2563.1	− 2567	−3.9	× 109 / 428	−1
Sum, rounded to a whole point						−1

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	17,764	2498.0	− 2502	−4	× 88 / 417	−0.8
6	17,765	2546.8	− 2531	15.8	× 111 / 417	4.2
7	17,766	2553.6	− 2552	1.6	× 112 / 417	0.4
8	17,767	2559.6	− 2567	−7.4	× 106 / 417	−1.9
Sum, rounded to a whole point						2

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	17,714	2505.5	− 2502	3.5	× 122 / 439	1
6	17,715	2535.3	− 2531	4.3	× 96 / 439	0.9
7	17,716	2568.8	− 2552	16.8	× 104 / 439	4
8	17,717	2562.3	− 2567	−4.7	× 117 / 439	−1.3
Sum, rounded to a whole point						5

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	17,709	2515.9	− 2502	13.9	× 123 / 444	3.9
6	17,710	2530.3	− 2531	−0.7	× 112 / 444	−0.2
7	17,711	2550.6	− 2552	−1.4	× 101 / 444	−0.3
8	17,712	2588.2	− 2567	21.2	× 108 / 444	5.2
Sum, rounded to a whole point						9

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −43, −6, −25, −12, 0, −4, −1, 2, 5, 9 → −7.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 37 · 2016→2017: 19 · 2017→2018: 13 · 2018→2019: 12 · 2019→2021: 4 · 2021→2022: 3 · 2022→2023: 3 · 2023→2024: 3 · 2024→2025: 4 → average 10.9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.9 × 2.66 = 29. Upper limit 21.5, lower limit −36.5.

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.