California Montessori Project - Elk Grove Campus: math

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	60,048	2402.5	− 2436	−33.5	× 57 / 200	−9.5
4	60,051	2432.8	− 2485	−52.2	× 43 / 200	−11.2
5	60,052	2463.6	− 2528	−64.4	× 24 / 200	−7.7
6	60,055	2484.8	− 2552	−67.2	× 38 / 200	−12.8
7	60,056	2523.7	− 2567	−43.3	× 20 / 200	−4.3
8	60,059	2485.4	− 2586	−100.6	× 18 / 200	−9.1
Sum, rounded to a whole point						−55

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	55,751	2405.8	− 2436	−30.2	× 63 / 214	−8.9
4	55,754	2443.5	− 2485	−41.5	× 46 / 214	−8.9
5	55,756	2464.9	− 2528	−63.1	× 38 / 214	−11.2
6	55,758	2504.8	− 2552	−47.2	× 21 / 214	−4.6
7	55,759	2531.1	− 2567	−35.9	× 26 / 214	−4.4
8	55,762	2547.6	− 2586	−38.4	× 20 / 214	−3.6
Sum, rounded to a whole point						−42

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,376	2392.5	− 2436	−43.5	× 68 / 218	−13.6
4	57,378	2448.8	− 2485	−36.2	× 49 / 218	−8.1
5	57,381	2480.2	− 2528	−47.8	× 34 / 218	−7.5
6	57,383	2493.0	− 2552	−59	× 31 / 218	−8.4
7	57,384	2570.6	− 2567	3.6	× 13 / 218	0.2
8	57,387	2555.7	− 2586	−30.3	× 23 / 218	−3.2
Sum, rounded to a whole point						−41

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,488	2398.9	− 2436	−37.1	× 74 / 249	−11
4	57,490	2427.0	− 2485	−58	× 63 / 249	−14.7
5	57,492	2462.3	− 2528	−65.7	× 49 / 249	−12.9
6	57,494	2485.2	− 2552	−66.8	× 33 / 249	−8.9
7	57,496	2485.2	− 2567	−81.8	× 18 / 249	−5.9
8	57,498	2568.3	− 2586	−17.7	× 12 / 249	−0.9
Sum, rounded to a whole point						−54

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,743	2411.7	− 2436	−24.3	× 70 / 266	−6.4
4	57,744	2443.3	− 2485	−41.7	× 60 / 266	−9.4
5	57,745	2452.0	− 2528	−76	× 54 / 266	−15.4
6	57,746	2485.4	− 2552	−66.6	× 41 / 266	−10.3
7	57,747	2522.0	− 2567	−45	× 25 / 266	−4.2
8	57,748	2478.1	− 2586	−107.9	× 16 / 266	−6.5
Sum, rounded to a whole point						−52

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,782	2435.8	− 2436	−0.2	× 57 / 301	0
4	57,783	2471.6	− 2485	−13.4	× 61 / 301	−2.7
5	57,784	2523.9	− 2528	−4.1	× 65 / 301	−0.9
6	57,785	2501.7	− 2552	−50.3	× 55 / 301	−9.2
7	57,786	2546.6	− 2567	−20.4	× 29 / 301	−2
8	57,787	2577.8	− 2586	−8.2	× 34 / 301	−0.9
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	57,742	2436.1	− 2436	0.1	× 64 / 299	0
4	57,743	2459.7	− 2485	−25.3	× 56 / 299	−4.7
5	57,744	2488.8	− 2528	−39.2	× 58 / 299	−7.6
6	57,745	2555.3	− 2552	3.3	× 56 / 299	0.6
7	57,746	2536.9	− 2567	−30.1	× 40 / 299	−4
8	57,747	2596.1	− 2586	10.1	× 25 / 299	0.8
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	57,642	2440.7	− 2436	4.7	× 55 / 295	0.9
4	57,643	2482.6	− 2485	−2.4	× 61 / 295	−0.5
5	57,644	2505.6	− 2528	−22.4	× 54 / 295	−4.1
6	57,645	2515.8	− 2552	−36.2	× 52 / 295	−6.4
7	57,646	2581.9	− 2567	14.9	× 32 / 295	1.6
8	57,647	2551.7	− 2586	−34.3	× 41 / 295	−4.8
Sum, rounded to a whole point						−13

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	57,402	2436.9	− 2436	0.9	× 73 / 309	0.2
4	57,403	2454.0	− 2485	−31	× 53 / 309	−5.3
5	57,404	2516.8	− 2528	−11.2	× 61 / 309	−2.2
6	57,405	2536.9	− 2552	−15.1	× 57 / 309	−2.8
7	57,406	2552.9	− 2567	−14.1	× 36 / 309	−1.6
8	57,407	2590.2	− 2586	4.2	× 29 / 309	0.4
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. −55, −42, −41, −54, −52, −16, −15, −13, −11 → −33.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 13 · 2016→2017: 1 · 2017→2018: 13 · 2018→2019: 2 · 2019→2022: 36 · 2022→2023: 1 · 2023→2024: 2 · 2024→2025: 2 → average 8.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 8.8 × 2.66 = 23.4. Upper limit −9.8, lower limit −56.6.

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