Etiwanda Elementary: 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	65,593	2448.7	− 2436	12.7	× 1516 / 9390	2.1
4	65,594	2494.7	− 2485	9.7	× 1458 / 9390	1.5
5	65,597	2516.3	− 2528	−11.7	× 1558 / 9390	−1.9
6	65,598	2543.8	− 2552	−8.2	× 1622 / 9390	−1.4
7	65,601	2567.8	− 2567	0.8	× 1621 / 9390	0.1
8	65,602	2592.4	− 2586	6.4	× 1615 / 9390	1.1
Sum, rounded to a whole point						1

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,823	2458.7	− 2436	22.7	× 1464 / 9533	3.5
4	60,826	2497.2	− 2485	12.2	× 1574 / 9533	2
5	60,828	2523.0	− 2528	−5	× 1518 / 9533	−0.8
6	60,830	2550.9	− 2552	−1.1	× 1652 / 9533	−0.2
7	60,831	2570.3	− 2567	3.3	× 1670 / 9533	0.6
8	60,834	2601.4	− 2586	15.4	× 1655 / 9533	2.7
Sum, rounded to a whole point						8

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,575	2471.9	− 2436	35.9	× 1426 / 9545	5.4
4	62,578	2499.2	− 2485	14.2	× 1495 / 9545	2.2
5	62,580	2529.3	− 2528	1.3	× 1612 / 9545	0.2
6	62,581	2557.0	− 2552	5	× 1618 / 9545	0.8
7	62,583	2581.7	− 2567	14.7	× 1713 / 9545	2.6
8	62,585	2607.0	− 2586	21	× 1681 / 9545	3.7
Sum, rounded to a whole point						15

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,656	2471.3	− 2436	35.3	× 1429 / 9529	5.3
4	62,658	2512.3	− 2485	27.3	× 1486 / 9529	4.3
5	62,660	2532.1	− 2528	4.1	× 1559 / 9529	0.7
6	62,662	2562.5	− 2552	10.5	× 1677 / 9529	1.8
7	62,664	2582.2	− 2567	15.2	× 1636 / 9529	2.6
8	62,666	2615.0	− 2586	29	× 1742 / 9529	5.3
Sum, rounded to a whole point						20

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,927	2471.9	− 2436	35.9	× 1450 / 9368	5.6
4	62,928	2518.2	− 2485	33.2	× 1472 / 9368	5.2
5	62,929	2545.6	− 2528	17.6	× 1520 / 9368	2.9
6	62,930	2556.0	− 2552	4	× 1609 / 9368	0.7
7	62,931	2583.2	− 2567	16.2	× 1700 / 9368	2.9
8	62,932	2608.4	− 2586	22.4	× 1617 / 9368	3.9
Sum, rounded to a whole point						21

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,990	2464.9	− 2436	28.9	× 1442 / 8854	4.7
4	62,991	2511.6	− 2485	26.6	× 1419 / 8854	4.3
5	62,992	2529.7	− 2528	1.7	× 1485 / 8854	0.3
6	62,993	2552.1	− 2552	0.1	× 1464 / 8854	0
7	62,994	2572.7	− 2567	5.7	× 1504 / 8854	1
8	62,995	2591.3	− 2586	5.3	× 1540 / 8854	0.9
Sum, rounded to a whole point						11

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,938	2470.5	− 2436	34.5	× 1480 / 8907	5.7
4	62,939	2514.5	− 2485	29.5	× 1482 / 8907	4.9
5	62,940	2538.9	− 2528	10.9	× 1466 / 8907	1.8
6	62,941	2551.0	− 2552	−1	× 1522 / 8907	−0.2
7	62,942	2572.4	− 2567	5.4	× 1474 / 8907	0.9
8	62,943	2599.1	− 2586	13.1	× 1483 / 8907	2.2
Sum, rounded to a whole point						15

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,897	2471.8	− 2436	35.8	× 1476 / 9057	5.8
4	62,898	2520.0	− 2485	35	× 1491 / 9057	5.8
5	62,899	2536.3	− 2528	8.3	× 1533 / 9057	1.4
6	62,900	2557.7	− 2552	5.7	× 1495 / 9057	0.9
7	62,901	2578.3	− 2567	11.3	× 1557 / 9057	1.9
8	62,902	2605.1	− 2586	19.1	× 1505 / 9057	3.2
Sum, rounded to a whole point						19

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,668	2474.9	− 2436	38.9	× 1415 / 9006	6.1
4	62,669	2517.5	− 2485	32.5	× 1490 / 9006	5.4
5	62,670	2547.4	− 2528	19.4	× 1499 / 9006	3.2
6	62,671	2553.5	− 2552	1.5	× 1556 / 9006	0.3
7	62,672	2589.5	− 2567	22.5	× 1492 / 9006	3.7
8	62,673	2611.0	− 2586	25	× 1554 / 9006	4.3
Sum, rounded to a whole point						23

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,639	2474.6	− 2436	38.6	× 1353 / 8863	5.9
4	62,640	2522.0	− 2485	37	× 1416 / 8863	5.9
5	62,641	2549.5	− 2528	21.5	× 1524 / 8863	3.7
6	62,642	2559.7	− 2552	7.7	× 1496 / 8863	1.3
7	62,643	2576.4	− 2567	9.4	× 1563 / 8863	1.7
8	62,644	2621.2	− 2586	35.2	× 1511 / 8863	6
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. 1, 8, 15, 20, 21, 11, 15, 19, 23, 24 → 15.7
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: 7 · 2017→2018: 5 · 2018→2019: 1 · 2019→2022: 10 · 2022→2023: 4 · 2023→2024: 4 · 2024→2025: 4 · 2025→2026: 1 → average 4.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 4.8 × 2.66 = 12.8. Upper limit 28.5, lower limit 2.9.

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.

Etiwanda Elementary