Oak Grove Elementary: 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	88,247	2403.5	− 2432	−28.5	× 1207 / 6920	−5
4	88,249	2453.8	− 2473	−19.2	× 1132 / 6920	−3.1
5	88,251	2500.8	− 2502	−1.2	× 1187 / 6920	−0.2
6	88,253	2524.2	− 2531	−6.8	× 1177 / 6920	−1.2
7	88,255	2548.7	− 2552	−3.3	× 1143 / 6920	−0.5
8	88,257	2567.0	− 2567	0	× 1074 / 6920	0
Sum, rounded to a whole point						−10

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	81,912	2414.9	− 2432	−17.1	× 1095 / 6890	−2.7
4	81,913	2457.8	− 2473	−15.2	× 1187 / 6890	−2.6
5	81,916	2497.3	− 2502	−4.7	× 1134 / 6890	−0.8
6	81,918	2539.9	− 2531	8.9	× 1194 / 6890	1.5
7	81,919	2553.6	− 2552	1.6	× 1105 / 6890	0.3
8	81,922	2574.9	− 2567	7.9	× 1175 / 6890	1.3
Sum, rounded to a whole point						−3

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,192	2414.6	− 2432	−17.4	× 1132 / 6763	−2.9
4	84,193	2458.8	− 2473	−14.2	× 1100 / 6763	−2.3
5	84,195	2490.8	− 2502	−11.2	× 1207 / 6763	−2
6	84,197	2532.6	− 2531	1.6	× 1116 / 6763	0.3
7	84,200	2562.9	− 2552	10.9	× 1112 / 6763	1.8
8	84,201	2571.9	− 2567	4.9	× 1096 / 6763	0.8
Sum, rounded to a whole point						−4

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,409	2423.3	− 2432	−8.7	× 1009 / 6568	−1.3
4	84,412	2469.4	− 2473	−3.6	× 1128 / 6568	−0.6
5	84,414	2508.5	− 2502	6.5	× 1094 / 6568	1.1
6	84,415	2533.4	− 2531	2.4	× 1194 / 6568	0.4
7	84,418	2556.4	− 2552	4.4	× 1050 / 6568	0.7
8	84,419	2582.1	− 2567	15.1	× 1093 / 6568	2.5
Sum, rounded to a whole point						3

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	85,023	2423.4	− 2432	−8.6	× 1087 / 6395	−1.5
4	85,024	2466.1	− 2473	−6.9	× 985 / 6395	−1.1
5	85,025	2504.9	− 2502	2.9	× 1088 / 6395	0.5
6	85,026	2541.9	− 2531	10.9	× 1086 / 6395	1.9
7	85,027	2557.1	− 2552	5.1	× 1110 / 6395	0.9
8	85,028	2581.1	− 2567	14.1	× 1039 / 6395	2.3
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	85,204	2416.7	− 2432	−15.3	× 926 / 5670	−2.5
4	85,205	2458.1	− 2473	−14.9	× 924 / 5670	−2.4
5	85,206	2493.6	− 2502	−8.4	× 982 / 5670	−1.5
6	85,207	2530.5	− 2531	−0.5	× 1022 / 5670	−0.1
7	85,208	2552.2	− 2552	0.2	× 882 / 5670	0
8	85,209	2575.4	− 2567	8.4	× 934 / 5670	1.4
Sum, rounded to a whole point						−5

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	85,141	2410.7	− 2432	−21.3	× 922 / 5621	−3.5
4	85,142	2450.6	− 2473	−22.4	× 954 / 5621	−3.8
5	85,143	2494.6	− 2502	−7.4	× 942 / 5621	−1.2
6	85,144	2521.9	− 2531	−9.1	× 981 / 5621	−1.6
7	85,145	2546.3	− 2552	−5.7	× 948 / 5621	−1
8	85,146	2554.1	− 2567	−12.9	× 874 / 5621	−2
Sum, rounded to a whole point						−13

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	85,128	2402.6	− 2432	−29.4	× 865 / 5574	−4.6
4	85,129	2446.3	− 2473	−26.7	× 933 / 5574	−4.5
5	85,130	2482.2	− 2502	−19.8	× 958 / 5574	−3.4
6	85,131	2520.2	− 2531	−10.8	× 963 / 5574	−1.9
7	85,132	2539.9	− 2552	−12.1	× 927 / 5574	−2
8	85,133	2560.8	− 2567	−6.2	× 928 / 5574	−1
Sum, rounded to a whole point						−17

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,820	2413.3	− 2432	−18.7	× 881 / 5502	−3
4	84,821	2455.3	− 2473	−17.7	× 874 / 5502	−2.8
5	84,822	2486.0	− 2502	−16	× 936 / 5502	−2.7
6	84,823	2526.6	− 2531	−4.4	× 970 / 5502	−0.8
7	84,824	2549.7	− 2552	−2.3	× 917 / 5502	−0.4
8	84,825	2559.3	− 2567	−7.7	× 924 / 5502	−1.3
Sum, rounded to a whole point						−11

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −10, −3, −4, 3, 3, −5, −13, −17, −11 → −6.3
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 7 · 2016→2017: 1 · 2017→2018: 7 · 2018→2019: 0 · 2019→2022: 8 · 2022→2023: 8 · 2023→2024: 4 · 2024→2025: 6 → average 5.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 5.1 × 2.66 = 13.6. Upper limit 7.3, lower limit −19.9.

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.