Mountain Creek Middle: 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
5	9,222	2468.4	− 2528	−59.6	× 39 / 140	−16.6
6	9,225	2519.6	− 2552	−32.4	× 28 / 140	−6.5
7	9,226	2500.5	− 2567	−66.5	× 32 / 140	−15.2
8	9,229	2551.7	− 2586	−34.3	× 41 / 140	−10
Sum, rounded to a whole point						−48

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	8,303	2471.2	− 2528	−56.8	× 25 / 126	−11.3
6	8,305	2497.5	− 2552	−54.5	× 46 / 126	−19.9
7	8,306	2528.0	− 2567	−39	× 27 / 126	−8.4
8	8,308	2512.4	− 2586	−73.6	× 28 / 126	−16.4
Sum, rounded to a whole point						−56

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
5	8,574	2494.5	− 2528	−33.5	× 32 / 139	−7.7
6	8,577	2501.0	− 2552	−51	× 37 / 139	−13.6
7	8,578	2542.9	− 2567	−24.1	× 42 / 139	−7.3
8	8,580	2525.1	− 2586	−60.9	× 28 / 139	−12.3
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
5	8,608	2478.7	− 2528	−49.3	× 30 / 135	−11
6	8,611	2487.9	− 2552	−64.1	× 36 / 135	−17.1
7	8,612	2496.3	− 2567	−70.7	× 29 / 135	−15.2
8	8,615	2538.8	− 2586	−47.2	× 40 / 135	−14
Sum, rounded to a whole point						−57

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	8,664	2511.3	− 2552	−40.7	× 25 / 87	−11.7
7	8,665	2547.5	− 2567	−19.5	× 32 / 87	−7.2
8	8,666	2532.5	− 2586	−53.5	× 30 / 87	−18.4
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
6	8,496	2485.0	− 2552	−67	× 30 / 82	−24.5
7	8,497	2491.8	− 2567	−75.2	× 29 / 82	−26.6
8	8,498	2551.1	− 2586	−34.9	× 23 / 82	−9.8
Sum, rounded to a whole point						−61

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	8,617	2515.2	− 2552	−36.8	× 25 / 80	−11.5
7	8,618	2511.8	− 2567	−55.2	× 24 / 80	−16.6
8	8,619	2537.3	− 2586	−48.7	× 31 / 80	−18.9
Sum, rounded to a whole point						−47

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	8,595	2457.3	− 2552	−94.7	× 29 / 71	−38.7
7	8,596	2490.5	− 2567	−76.5	× 20 / 71	−21.5
8	8,597	2513.0	− 2586	−73	× 22 / 71	−22.6
Sum, rounded to a whole point						−83

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	8,541	2493.0	− 2552	−59	× 19 / 76	−14.8
7	8,542	2500.0	− 2567	−67	× 34 / 76	−30
8	8,543	2537.3	− 2586	−48.7	× 23 / 76	−14.7
Sum, rounded to a whole point						−59

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	8,500	2503.2	− 2552	−48.8	× 39 / 98	−19.4
7	8,501	2527.7	− 2567	−39.3	× 18 / 98	−7.2
8	8,502	2541.0	− 2586	−45	× 41 / 98	−18.8
Sum, rounded to a whole point						−45

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −48, −56, −41, −57, −37, −61, −47, −83, −59, −45 → −53.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 8 · 2016→2017: 15 · 2017→2018: 16 · 2018→2019: 20 · 2019→2021: 24 · 2021→2022: 14 · 2022→2023: 36 · 2023→2024: 24 · 2024→2025: 14 → average 19
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 19 × 2.66 = 50.5. Upper limit −2.9, lower limit −103.9.

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