Coronado Unified: math

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	71,004	2469.2	− 2436	33.2	× 175 / 1593	3.6
4	71,006	2517.3	− 2485	32.3	× 195 / 1593	4
5	71,008	2531.7	− 2528	3.7	× 223 / 1593	0.5
6	71,010	2579.8	− 2552	27.8	× 225 / 1593	3.9
7	71,012	2595.4	− 2567	28.4	× 258 / 1593	4.6
8	71,014	2615.5	− 2586	29.5	× 244 / 1593	4.5
11	71,016	2613.9	− 2628	−14.1	× 273 / 1593	−2.4
Sum, rounded to a whole point						19

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,808	2467.6	− 2436	31.6	× 189 / 1566	3.8
4	65,810	2507.2	− 2485	22.2	× 185 / 1566	2.6
5	65,811	2559.0	− 2528	31	× 199 / 1566	3.9
6	65,814	2565.5	− 2552	13.5	× 226 / 1566	1.9
7	65,816	2617.0	− 2567	50	× 229 / 1566	7.3
8	65,817	2616.0	− 2586	30	× 252 / 1566	4.8
11	65,820	2628.7	− 2628	0.7	× 286 / 1566	0.1
Sum, rounded to a whole point						25

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	67,626	2478.4	− 2436	42.4	× 178 / 1574	4.8
4	67,627	2507.2	− 2485	22.2	× 211 / 1574	3
5	67,630	2536.9	− 2528	8.9	× 198 / 1574	1.1
6	67,631	2578.5	− 2552	26.5	× 221 / 1574	3.7
7	67,634	2609.8	− 2567	42.8	× 235 / 1574	6.4
8	67,636	2655.1	− 2586	69.1	× 230 / 1574	10.1
11	67,637	2649.0	− 2628	21	× 301 / 1574	4
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	67,731	2470.5	− 2436	34.5	× 149 / 1504	3.4
4	67,733	2524.0	− 2485	39	× 185 / 1504	4.8
5	67,735	2545.5	− 2528	17.5	× 215 / 1504	2.5
6	67,737	2586.0	− 2552	34	× 215 / 1504	4.9
7	67,739	2604.5	− 2567	37.5	× 237 / 1504	5.9
8	67,741	2632.7	− 2586	46.7	× 239 / 1504	7.4
11	67,743	2647.9	− 2628	19.9	× 264 / 1504	3.5
Sum, rounded to a whole point						32

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	68,250	2477.2	− 2436	41.2	× 190 / 1565	5
4	68,251	2518.6	− 2485	33.6	× 171 / 1565	3.7
5	68,252	2565.3	− 2528	37.3	× 221 / 1565	5.3
6	68,253	2576.6	− 2552	24.6	× 234 / 1565	3.7
7	68,254	2614.2	− 2567	47.2	× 241 / 1565	7.3
8	68,255	2634.8	− 2586	48.8	× 238 / 1565	7.4
11	68,256	2657.7	− 2628	29.7	× 270 / 1565	5.1
Sum, rounded to a whole point						37

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	66,849	2472.3	− 2436	36.3	× 130 / 1174	4
4	66,850	2528.2	− 2485	43.2	× 148 / 1174	5.4
5	66,851	2545.8	− 2528	17.8	× 160 / 1174	2.4
6	66,852	2553.5	− 2552	1.5	× 165 / 1174	0.2
7	66,853	2574.8	− 2567	7.8	× 189 / 1174	1.3
8	66,854	2597.1	− 2586	11.1	× 197 / 1174	1.9
11	66,855	2672.0	− 2628	44	× 185 / 1174	6.9
Sum, rounded to a whole point						22

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	68,378	2487.0	− 2436	51	× 199 / 1411	7.2
4	68,379	2529.0	− 2485	44	× 155 / 1411	4.8
5	68,380	2561.6	− 2528	33.6	× 194 / 1411	4.6
6	68,381	2554.3	− 2552	2.3	× 185 / 1411	0.3
7	68,382	2607.8	− 2567	40.8	× 201 / 1411	5.8
8	68,383	2591.1	− 2586	5.1	× 246 / 1411	0.9
11	68,384	2639.3	− 2628	11.3	× 231 / 1411	1.8
Sum, rounded to a whole point						25

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	68,396	2499.9	− 2436	63.9	× 162 / 1395	7.4
4	68,397	2522.5	− 2485	37.5	× 211 / 1395	5.7
5	68,398	2556.9	− 2528	28.9	× 163 / 1395	3.4
6	68,399	2576.0	− 2552	24	× 225 / 1395	3.9
7	68,400	2589.3	− 2567	22.3	× 203 / 1395	3.2
8	68,401	2614.1	− 2586	28.1	× 201 / 1395	4
11	68,402	2634.5	− 2628	6.5	× 230 / 1395	1.1
Sum, rounded to a whole point						29

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	68,390	2501.2	− 2436	65.2	× 171 / 1401	8
4	68,391	2540.7	− 2485	55.7	× 173 / 1401	6.9
5	68,392	2557.2	− 2528	29.2	× 209 / 1401	4.4
6	68,393	2566.9	− 2552	14.9	× 172 / 1401	1.8
7	68,394	2598.9	− 2567	31.9	× 229 / 1401	5.2
8	68,395	2613.7	− 2586	27.7	× 208 / 1401	4.1
11	68,396	2611.6	− 2628	−16.4	× 239 / 1401	−2.8
Sum, rounded to a whole point						28

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	68,158	2477.9	− 2436	41.9	× 165 / 1375	5
4	68,159	2536.0	− 2485	51	× 162 / 1375	6
5	68,160	2561.7	− 2528	33.7	× 181 / 1375	4.4
6	68,161	2559.5	− 2552	7.5	× 214 / 1375	1.2
7	68,162	2576.8	− 2567	9.8	× 203 / 1375	1.4
8	68,163	2613.7	− 2586	27.7	× 221 / 1375	4.5
11	68,164	2638.2	− 2628	10.2	× 229 / 1375	1.7
Sum, rounded to a whole point						24

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. 19, 25, 33, 32, 37, 22, 25, 29, 28, 24 → 27.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 6 · 2016→2017: 8 · 2017→2018: 1 · 2018→2019: 5 · 2019→2021: 15 · 2021→2022: 3 · 2022→2023: 4 · 2023→2024: 1 · 2024→2025: 4 → average 5.2
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 5.2 × 2.66 = 13.8. Upper limit 41.2, lower limit 13.6.

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.