Hart-Ransom 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
3	96,785	2405.4	− 2432	−26.6	× 88 / 525	−4.5
4	96,786	2443.1	− 2473	−29.9	× 84 / 525	−4.8
5	96,789	2476.0	− 2502	−26	× 86 / 525	−4.3
6	96,790	2525.0	− 2531	−6	× 92 / 525	−1.1
7	96,793	2552.4	− 2552	0.4	× 84 / 525	0.1
8	96,794	2565.9	− 2567	−1.1	× 91 / 525	−0.2
Sum, rounded to a whole point						−15

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,746	2432.1	− 2432	0.1	× 74 / 495	0
4	89,749	2436.7	− 2473	−36.3	× 90 / 495	−6.6
5	89,751	2501.8	− 2502	−0.2	× 90 / 495	0
6	89,752	2522.2	− 2531	−8.8	× 83 / 495	−1.5
7	89,754	2558.8	− 2552	6.8	× 80 / 495	1.1
8	89,756	2580.8	− 2567	13.8	× 78 / 495	2.2
Sum, rounded to a whole point						−5

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,375	2425.1	− 2432	−6.9	× 84 / 511	−1.1
4	92,377	2465.5	− 2473	−7.5	× 85 / 511	−1.2
5	92,378	2483.5	− 2502	−18.5	× 89 / 511	−3.2
6	92,380	2525.2	− 2531	−5.8	× 86 / 511	−1
7	92,382	2552.5	− 2552	0.5	× 85 / 511	0.1
8	92,385	2554.5	− 2567	−12.5	× 82 / 511	−2
Sum, rounded to a whole point						−9

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,574	2432.3	− 2432	0.3	× 89 / 511	0.1
4	92,575	2471.0	− 2473	−2	× 83 / 511	−0.3
5	92,578	2502.4	− 2502	0.4	× 89 / 511	0.1
6	92,579	2536.6	− 2531	5.6	× 80 / 511	0.9
7	92,582	2558.5	− 2552	6.5	× 84 / 511	1.1
8	92,583	2606.2	− 2567	39.2	× 86 / 511	6.6
Sum, rounded to a whole point						8

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	93,204	2441.8	− 2432	9.8	× 90 / 529	1.7
4	93,205	2475.6	− 2473	2.6	× 91 / 529	0.4
5	93,206	2515.5	− 2502	13.5	× 86 / 529	2.2
6	93,207	2531.4	− 2531	0.4	× 86 / 529	0.1
7	93,208	2566.6	− 2552	14.6	× 89 / 529	2.5
8	93,209	2603.4	− 2567	36.4	× 87 / 529	6
Sum, rounded to a whole point						13

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,219	2401.7	− 2432	−30.3	× 84 / 484	−5.3
4	91,220	2456.3	− 2473	−16.7	× 80 / 484	−2.8
5	91,221	2531.6	− 2502	29.6	× 83 / 484	5.1
6	91,222	2507.2	− 2531	−23.8	× 84 / 484	−4.1
7	91,223	2563.4	− 2552	11.4	× 79 / 484	1.9
8	91,224	2544.2	− 2567	−22.8	× 74 / 484	−3.5
Sum, rounded to a whole point						−9

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	93,435	2437.6	− 2432	5.6	× 87 / 501	1
4	93,436	2497.2	− 2473	24.2	× 89 / 501	4.3
5	93,437	2523.5	− 2502	21.5	× 82 / 501	3.5
6	93,438	2542.9	− 2531	11.9	× 82 / 501	1.9
7	93,439	2543.5	− 2552	−8.5	× 83 / 501	−1.4
8	93,440	2607.1	− 2567	40.1	× 78 / 501	6.2
Sum, rounded to a whole point						16

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	93,331	2435.1	− 2432	3.1	× 57 / 483	0.4
4	93,332	2494.9	− 2473	21.9	× 89 / 483	4
5	93,333	2512.4	− 2502	10.4	× 89 / 483	1.9
6	93,334	2526.8	− 2531	−4.2	× 80 / 483	−0.7
7	93,335	2545.7	− 2552	−6.3	× 83 / 483	−1.1
8	93,336	2577.5	− 2567	10.5	× 85 / 483	1.8
Sum, rounded to a whole point						6

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	93,218	2411.5	− 2432	−20.5	× 91 / 489	−3.8
4	93,219	2488.3	− 2473	15.3	× 59 / 489	1.8
5	93,220	2522.0	− 2502	20	× 84 / 489	3.4
6	93,221	2513.5	− 2531	−17.5	× 91 / 489	−3.3
7	93,222	2550.6	− 2552	−1.4	× 85 / 489	−0.2
8	93,223	2594.2	− 2567	27.2	× 79 / 489	4.4
Sum, rounded to a whole point						2

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	92,948	2429.6	− 2432	−2.4	× 62 / 470	−0.3
4	92,949	2460.4	− 2473	−12.6	× 89 / 470	−2.4
5	92,950	2533.1	− 2502	31.1	× 56 / 470	3.7
6	92,951	2521.6	− 2531	−9.4	× 92 / 470	−1.8
7	92,952	2561.3	− 2552	9.3	× 88 / 470	1.7
8	92,953	2611.1	− 2567	44.1	× 83 / 470	7.8
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. −15, −5, −9, 8, 13, −9, 16, 6, 2, 9 → 1.6
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 10 · 2016→2017: 4 · 2017→2018: 17 · 2018→2019: 5 · 2019→2021: 22 · 2021→2022: 25 · 2022→2023: 10 · 2023→2024: 4 · 2024→2025: 7 → average 11.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 11.6 × 2.66 = 30.9. Upper limit 32.5, lower limit −29.3.

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.