Dixon Montessori Charter: 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	92,873	2377.7	− 2432	−54.3	× 49 / 240	−11.1
4	92,876	2452.3	− 2473	−20.7	× 49 / 240	−4.2
5	92,877	2489.7	− 2502	−12.3	× 47 / 240	−2.4
6	92,880	2508.1	− 2531	−22.9	× 45 / 240	−4.3
7	92,881	2546.5	− 2552	−5.5	× 31 / 240	−0.7
8	92,884	2526.0	− 2567	−41	× 19 / 240	−3.2
Sum, rounded to a whole point						−26

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,306	2427.0	− 2432	−5	× 50 / 249	−1
4	86,308	2443.1	− 2473	−29.9	× 46 / 249	−5.5
5	86,309	2484.1	− 2502	−17.9	× 51 / 249	−3.7
6	86,312	2501.8	− 2531	−29.2	× 44 / 249	−5.2
7	86,314	2520.5	− 2552	−31.5	× 31 / 249	−3.9
8	86,316	2546.2	− 2567	−20.8	× 27 / 249	−2.3
Sum, rounded to a whole point						−22

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	88,657	2401.4	− 2432	−30.6	× 50 / 229	−6.7
4	88,659	2472.8	− 2473	−0.2	× 51 / 229	0
5	88,662	2475.2	− 2502	−26.8	× 46 / 229	−5.4
6	88,664	2498.6	− 2531	−32.4	× 36 / 229	−5.1
7	88,666	2523.6	− 2552	−28.4	× 24 / 229	−3
8	88,668	2568.2	− 2567	1.2	× 22 / 229	0.1
Sum, rounded to a whole point						−20

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	88,884	2441.8	− 2432	9.8	× 44 / 220	2
4	88,887	2429.2	− 2473	−43.8	× 47 / 220	−9.4
5	88,888	2510.0	− 2502	8	× 51 / 220	1.9
6	88,891	2519.7	− 2531	−11.3	× 49 / 220	−2.5
7	88,892	2545.2	− 2552	−6.8	× 16 / 220	−0.5
8	88,895	2581.2	− 2567	14.2	× 13 / 220	0.8
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	89,499	2412.4	− 2432	−19.6	× 51 / 239	−4.2
4	89,500	2471.2	− 2473	−1.8	× 43 / 239	−0.3
5	89,501	2489.2	− 2502	−12.8	× 50 / 239	−2.7
6	89,502	2536.7	− 2531	5.7	× 47 / 239	1.1
7	89,503	2554.6	− 2552	2.6	× 32 / 239	0.3
8	89,504	2540.3	− 2567	−26.7	× 16 / 239	−1.8
Sum, rounded to a whole point						−8

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,671	2416.2	− 2432	−15.8	× 50 / 258	−3.1
4	87,672	2457.4	− 2473	−15.6	× 50 / 258	−3
5	87,673	2487.2	− 2502	−14.8	× 46 / 258	−2.6
6	87,674	2529.4	− 2531	−1.6	× 38 / 258	−0.2
7	87,675	2561.8	− 2552	9.8	× 40 / 258	1.5
8	87,676	2600.8	− 2567	33.8	× 34 / 258	4.5
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	89,745	2426.6	− 2432	−5.4	× 49 / 252	−1.1
4	89,746	2454.5	− 2473	−18.5	× 49 / 252	−3.6
5	89,747	2516.7	− 2502	14.7	× 49 / 252	2.9
6	89,748	2515.6	− 2531	−15.4	× 41 / 252	−2.5
7	89,749	2595.4	− 2552	43.4	× 32 / 252	5.5
8	89,750	2615.8	− 2567	48.8	× 32 / 252	6.2
Sum, rounded to a whole point						7

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,637	2422.5	− 2432	−9.5	× 52 / 264	−1.9
4	89,638	2465.5	− 2473	−7.5	× 52 / 264	−1.5
5	89,639	2509.5	− 2502	7.5	× 52 / 264	1.5
6	89,640	2543.3	− 2531	12.3	× 47 / 264	2.2
7	89,641	2584.7	− 2552	32.7	× 33 / 264	4.1
8	89,642	2638.3	− 2567	71.3	× 28 / 264	7.6
Sum, rounded to a whole point						12

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,596	2401.5	− 2432	−30.5	× 50 / 273	−5.6
4	89,597	2449.4	− 2473	−23.6	× 51 / 273	−4.4
5	89,598	2506.8	− 2502	4.8	× 51 / 273	0.9
6	89,599	2538.9	− 2531	7.9	× 49 / 273	1.4
7	89,600	2596.4	− 2552	44.4	× 45 / 273	7.3
8	89,601	2582.7	− 2567	15.7	× 27 / 273	1.6
Sum, rounded to a whole point						1

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,300	2416.0	− 2432	−16	× 51 / 287	−2.8
4	89,301	2434.5	− 2473	−38.5	× 50 / 287	−6.7
5	89,302	2497.2	− 2502	−4.8	× 51 / 287	−0.9
6	89,303	2558.0	− 2531	27	× 50 / 287	4.7
7	89,304	2587.7	− 2552	35.7	× 45 / 287	5.6
8	89,305	2611.0	− 2567	44	× 40 / 287	6.1
Sum, rounded to a whole point						6

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −26, −22, −20, −8, −8, −3, 7, 12, 1, 6 → −6.1
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 4 · 2016→2017: 2 · 2017→2018: 12 · 2018→2019: 0 · 2019→2021: 5 · 2021→2022: 10 · 2022→2023: 5 · 2023→2024: 11 · 2024→2025: 5 → average 6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 6 × 2.66 = 16. Upper limit 9.9, lower limit −22.1.

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. From 2014–15, 2015–16, 2016–17, 2017–18, 2018–19, 2020–21, 2021–22, 2022–23, 2023–24, 2024–25, 2025–26.