Riverdale Joint Unified: english

The shaded band is this district'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	12,796	2394.2	− 2432	−37.8	× 122 / 785	−5.9
4	12,799	2411.7	− 2473	−61.3	× 126 / 785	−9.8
5	12,800	2442.7	− 2502	−59.3	× 105 / 785	−7.9
6	12,803	2451.9	− 2531	−79.1	× 90 / 785	−9.1
7	12,804	2496.2	− 2552	−55.8	× 105 / 785	−7.5
8	12,807	2516.5	− 2567	−50.5	× 111 / 785	−7.1
11	12,808	2580.5	− 2583	−2.5	× 126 / 785	−0.4
Sum, rounded to a whole point						−48

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	11,816	2412.8	− 2432	−19.2	× 107 / 804	−2.6
4	11,818	2432.0	− 2473	−41	× 126 / 804	−6.4
5	11,820	2454.8	− 2502	−47.2	× 132 / 804	−7.7
6	11,822	2481.8	− 2531	−49.2	× 110 / 804	−6.7
7	11,825	2484.1	− 2552	−67.9	× 89 / 804	−7.5
8	11,827	2520.2	− 2567	−46.8	× 105 / 804	−6.1
11	11,829	2582.3	− 2583	−0.7	× 135 / 804	−0.1
Sum, rounded to a whole point						−37

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	12,143	2427.4	− 2432	−4.6	× 104 / 840	−0.6
4	12,146	2438.8	− 2473	−34.2	× 105 / 840	−4.3
5	12,147	2462.3	− 2502	−39.7	× 128 / 840	−6
6	12,149	2487.6	− 2531	−43.4	× 134 / 840	−6.9
7	12,152	2499.7	− 2552	−52.3	× 116 / 840	−7.2
8	12,153	2512.6	− 2567	−54.4	× 95 / 840	−6.2
11	12,155	2571.9	− 2583	−11.1	× 158 / 840	−2.1
Sum, rounded to a whole point						−33

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	12,175	2449.8	− 2432	17.8	× 113 / 830	2.4
4	12,176	2447.9	− 2473	−25.1	× 104 / 830	−3.1
5	12,179	2479.7	− 2502	−22.3	× 106 / 830	−2.8
6	12,180	2498.9	− 2531	−32.1	× 131 / 830	−5.1
7	12,183	2500.9	− 2552	−51.1	× 132 / 830	−8.1
8	12,184	2515.2	− 2567	−51.8	× 115 / 830	−7.2
11	12,187	2560.2	− 2583	−22.8	× 129 / 830	−3.5
Sum, rounded to a whole point						−27

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	12,268	2428.0	− 2432	−4	× 94 / 817	−0.5
4	12,269	2450.7	− 2473	−22.3	× 113 / 817	−3.1
5	12,270	2476.0	− 2502	−26	× 110 / 817	−3.5
6	12,271	2516.1	− 2531	−14.9	× 105 / 817	−1.9
7	12,272	2529.6	− 2552	−22.4	× 126 / 817	−3.5
8	12,273	2502.8	− 2567	−64.2	× 131 / 817	−10.3
11	12,274	2580.0	− 2583	−3	× 138 / 817	−0.5
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	12,088	2381.7	− 2432	−50.3	× 81 / 699	−5.8
4	12,089	2408.9	− 2473	−64.1	× 113 / 699	−10.4
5	12,090	2463.7	− 2502	−38.3	× 89 / 699	−4.9
6	12,091	2498.2	− 2531	−32.8	× 89 / 699	−4.2
7	12,092	2518.8	− 2552	−33.2	× 97 / 699	−4.6
8	12,093	2542.9	− 2567	−24.1	× 99 / 699	−3.4
11	12,094	2573.5	− 2583	−9.5	× 131 / 699	−1.8
Sum, rounded to a whole point						−35

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	12,275	2399.4	− 2432	−32.6	× 104 / 762	−4.4
4	12,276	2420.1	− 2473	−52.9	× 100 / 762	−6.9
5	12,277	2462.2	− 2502	−39.8	× 119 / 762	−6.2
6	12,278	2487.7	− 2531	−43.3	× 90 / 762	−5.1
7	12,279	2536.1	− 2552	−15.9	× 103 / 762	−2.1
8	12,280	2544.0	− 2567	−23	× 104 / 762	−3.1
11	12,281	2575.2	− 2583	−7.8	× 142 / 762	−1.5
Sum, rounded to a whole point						−29

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	12,254	2394.5	− 2432	−37.5	× 90 / 741	−4.6
4	12,255	2428.4	− 2473	−44.6	× 105 / 741	−6.3
5	12,256	2446.0	− 2502	−56	× 100 / 741	−7.6
6	12,257	2484.4	− 2531	−46.6	× 119 / 741	−7.5
7	12,258	2508.4	− 2552	−43.6	× 86 / 741	−5.1
8	12,259	2557.1	− 2567	−9.9	× 103 / 741	−1.4
11	12,260	2562.5	− 2583	−20.5	× 138 / 741	−3.8
Sum, rounded to a whole point						−36

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	12,217	2397.5	− 2432	−34.5	× 79 / 708	−3.8
4	12,218	2397.7	− 2473	−75.3	× 90 / 708	−9.6
5	12,219	2473.9	− 2502	−28.1	× 102 / 708	−4
6	12,220	2485.1	− 2531	−45.9	× 101 / 708	−6.5
7	12,221	2505.5	− 2552	−46.5	× 117 / 708	−7.7
8	12,222	2538.6	− 2567	−28.4	× 86 / 708	−3.4
11	12,223	2545.3	− 2583	−37.7	× 133 / 708	−7.1
Sum, rounded to a whole point						−42

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	12,172	2397.1	− 2432	−34.9	× 84 / 717	−4.1
4	12,173	2417.8	− 2473	−55.2	× 82 / 717	−6.3
5	12,174	2444.3	− 2502	−57.7	× 92 / 717	−7.4
6	12,175	2518.5	− 2531	−12.5	× 103 / 717	−1.8
7	12,176	2518.1	− 2552	−33.9	× 102 / 717	−4.8
8	12,177	2525.7	− 2567	−41.3	× 118 / 717	−6.8
11	12,178	2563.3	− 2583	−19.7	× 136 / 717	−3.7
Sum, rounded to a whole point						−35

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −48, −37, −33, −27, −23, −35, −29, −36, −42, −35 → −34.5
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 11 · 2016→2017: 4 · 2017→2018: 6 · 2018→2019: 4 · 2019→2021: 12 · 2021→2022: 6 · 2022→2023: 7 · 2023→2024: 6 · 2024→2025: 7 → average 7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7 × 2.66 = 18.6. Upper limit −15.9, lower limit −53.1.

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 — for a district, the total across its schools. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.