Redding STEM Academy: 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.

Measured against the grade bars

The state's math test uses one scale for every grade, so a score means the same thing in grade 3 as in grade 8.

3rd The average 3rd grader scores 46 points under the grade 3 bar. 2390 vs. 2436.
4th The average 4th grader scores 23 points under the grade 3 bar. 2413 vs. 2436. The 4th-grade bar is 2485.
5th The average 5th grader scores 24 points under the grade 4 bar. 2461 vs. 2485. The 5th-grade bar is 2528.
6th The average 6th grader scores 19 points under the grade 5 bar. 2509 vs. 2528. The 6th-grade bar is 2552.
7th The average 7th grader scores 19 points under the grade 6 bar. 2534 vs. 2552. The 7th-grade bar is 2567.
8th The average 8th grader scores 17 points under the grade 8 bar. 2569 vs. 2586.

2026 results. "Meets standard" is the state's mark for being on track for that grade.

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.

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	84,117	2378.9	− 2436	−57.1	× 24 / 142	−9.7
4	84,119	2443.3	− 2485	−41.7	× 24 / 142	−7
5	84,121	2460.6	− 2528	−67.4	× 26 / 142	−12.3
6	84,124	2511.9	− 2552	−40.1	× 29 / 142	−8.2
7	84,126	2511.8	− 2567	−55.2	× 19 / 142	−7.4
8	84,127	2481.7	− 2586	−104.3	× 20 / 142	−14.7
Sum, rounded to a whole point						−59

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,443	2441.1	− 2436	5.1	× 22 / 133	0.8
4	86,445	2455.9	− 2485	−29.1	× 21 / 133	−4.6
5	86,447	2473.2	− 2528	−54.8	× 27 / 133	−11.1
6	86,450	2494.1	− 2552	−57.9	× 23 / 133	−10
7	86,451	2567.7	− 2567	0.7	× 22 / 133	0.1
8	86,453	2547.7	− 2586	−38.3	× 18 / 133	−5.2
Sum, rounded to a whole point						−30

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,673	2466.7	− 2436	30.7	× 19 / 134	4.4
4	86,676	2478.7	− 2485	−6.3	× 23 / 134	−1.1
5	86,677	2460.2	− 2528	−67.8	× 26 / 134	−13.2
6	86,680	2520.4	− 2552	−31.6	× 24 / 134	−5.7
7	86,681	2551.1	− 2567	−15.9	× 20 / 134	−2.4
8	86,684	2596.2	− 2586	10.2	× 22 / 134	1.7
Sum, rounded to a whole point						−16

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,274	2439.9	− 2436	3.9	× 29 / 139	0.8
4	87,275	2475.2	− 2485	−9.8	× 17 / 139	−1.2
5	87,276	2490.1	− 2528	−37.9	× 26 / 139	−7.1
6	87,277	2509.7	− 2552	−42.3	× 27 / 139	−8.2
7	87,278	2534.6	− 2567	−32.4	× 19 / 139	−4.4
8	87,279	2549.4	− 2586	−36.6	× 21 / 139	−5.5
Sum, rounded to a whole point						−26

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	85,548	2442.8	− 2436	6.8	× 28 / 153	1.2
4	85,549	2484.8	− 2485	−0.2	× 26 / 153	0
5	85,550	2496.6	− 2528	−31.4	× 27 / 153	−5.5
6	85,551	2561.0	− 2552	9	× 27 / 153	1.6
7	85,552	2555.5	− 2567	−11.5	× 21 / 153	−1.6
8	85,553	2534.0	− 2586	−52	× 24 / 153	−8.2
Sum, rounded to a whole point						−12

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,611	2404.3	− 2436	−31.7	× 24 / 145	−5.2
4	87,612	2491.8	− 2485	6.8	× 25 / 145	1.2
5	87,613	2482.5	− 2528	−45.5	× 26 / 145	−8.2
6	87,614	2534.7	− 2552	−17.3	× 26 / 145	−3.1
7	87,615	2553.6	− 2567	−13.4	× 24 / 145	−2.2
8	87,616	2504.0	− 2586	−82	× 20 / 145	−11.3
Sum, rounded to a whole point						−29

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,531	2408.4	− 2436	−27.6	× 26 / 143	−5
4	87,532	2457.4	− 2485	−27.6	× 23 / 143	−4.4
5	87,533	2493.1	− 2528	−34.9	× 24 / 143	−5.9
6	87,534	2531.1	− 2552	−20.9	× 26 / 143	−3.8
7	87,535	2586.0	− 2567	19	× 24 / 143	3.2
8	87,536	2578.4	− 2586	−7.6	× 20 / 143	−1.1
Sum, rounded to a whole point						−17

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,511	2417.0	− 2436	−19	× 26 / 133	−3.7
4	87,512	2460.8	− 2485	−24.2	× 21 / 133	−3.8
5	87,513	2451.7	− 2528	−76.3	× 22 / 133	−12.6
6	87,514	2507.6	− 2552	−44.4	× 21 / 133	−7
7	87,515	2515.0	− 2567	−52	× 23 / 133	−9
8	87,516	2622.3	− 2586	36.3	× 20 / 133	5.5
Sum, rounded to a whole point						−31

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,193	2393.0	− 2436	−43	× 20 / 133	−6.5
4	87,194	2455.8	− 2485	−29.2	× 25 / 133	−5.5
5	87,195	2491.1	− 2528	−36.9	× 24 / 133	−6.7
6	87,196	2464.2	− 2552	−87.8	× 22 / 133	−14.5
7	87,197	2547.5	− 2567	−19.5	× 20 / 133	−2.9
8	87,198	2542.2	− 2586	−43.8	× 22 / 133	−7.2
Sum, rounded to a whole point						−43

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	86,918	2389.8	− 2436	−46.2	× 32 / 137	−10.8
4	86,919	2412.9	− 2485	−72.1	× 18 / 137	−9.5
5	86,920	2461.0	− 2528	−67	× 27 / 137	−13.2
6	86,921	2509.3	− 2552	−42.7	× 19 / 137	−5.9
7	86,922	2533.5	− 2567	−33.5	× 22 / 137	−5.4
8	86,923	2569.3	− 2586	−16.7	× 19 / 137	−2.3
Sum, rounded to a whole point						−47

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −59, −30, −16, −26, −12, −29, −17, −31, −43, −47 → −31
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2016→2017: 29 · 2017→2018: 14 · 2018→2019: 10 · 2019→2021: 14 · 2021→2022: 17 · 2022→2023: 12 · 2023→2024: 14 · 2024→2025: 12 · 2025→2026: 4 → average 14
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 14 × 2.66 = 37.2. Upper limit 6.2, lower limit −68.2.

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