Cinnabar Charter: 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.

Many students here are still learning English. The math test is written in English, with some translation help, and many of its questions are word problems. In 2026, 29 of the 107 students who took the math test were English learners.

3rd The average 3rd grader scores 49 points under the grade 3 bar. 2387 vs. 2436.
4th The average 4th grader scores 45 points under the grade 3 bar. 2391 vs. 2436. The 4th-grade bar is 2485.
5th The average 5th grader scores 25 points under the grade 4 bar. 2461 vs. 2485. The 5th-grade bar is 2528.
6th The average 6th grader scores 37 points under the grade 4 bar. 2448 vs. 2485. The 6th-grade bar is 2552.
7th The average 7th grader scores 31 points under the grade 5 bar. 2497 vs. 2528. The 7th-grade bar is 2567.
8th The average 8th grader scores just under the grade 6 bar. 2545 vs. 2552. The 8th-grade bar is 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.

2015 from sb_ca2015_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	94,065	2398.9	− 2436	−37.1	× 23 / 155	−5.5
4	94,067	2469.4	− 2485	−15.6	× 28 / 155	−2.8
5	94,068	2486.3	− 2528	−41.7	× 27 / 155	−7.3
6	94,071	2474.0	− 2552	−78	× 31 / 155	−15.6
7	94,072	2541.4	− 2567	−25.6	× 26 / 155	−4.3
8	94,075	2533.7	− 2586	−52.3	× 20 / 155	−6.7
Sum, rounded to a whole point						−42

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	87,319	2420.7	− 2436	−15.3	× 27 / 151	−2.7
4	87,321	2467.7	− 2485	−17.3	× 22 / 151	−2.5
5	87,324	2464.9	− 2528	−63.1	× 30 / 151	−12.5
6	87,325	2490.9	− 2552	−61.1	× 28 / 151	−11.3
7	87,327	2493.2	− 2567	−73.8	× 19 / 151	−9.3
8	87,329	2548.2	− 2586	−37.8	× 25 / 151	−6.3
Sum, rounded to a whole point						−45

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	89,805	2424.1	− 2436	−11.9	× 29 / 170	−2
4	89,807	2452.3	− 2485	−32.7	× 26 / 170	−5
5	89,808	2441.3	− 2528	−86.7	× 27 / 170	−13.8
6	89,811	2501.8	− 2552	−50.2	× 37 / 170	−10.9
7	89,812	2519.4	− 2567	−47.6	× 30 / 170	−8.4
8	89,814	2501.5	− 2586	−84.5	× 21 / 170	−10.4
Sum, rounded to a whole point						−51

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,020	2424.4	− 2436	−11.6	× 38 / 182	−2.4
4	90,021	2462.7	− 2485	−22.3	× 28 / 182	−3.4
5	90,024	2472.7	− 2528	−55.3	× 29 / 182	−8.8
6	90,025	2455.8	− 2552	−96.2	× 31 / 182	−16.4
7	90,028	2488.6	− 2567	−78.4	× 31 / 182	−13.4
8	90,029	2521.4	− 2586	−64.6	× 25 / 182	−8.9
Sum, rounded to a whole point						−53

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,634	2423.2	− 2436	−12.8	× 32 / 178	−2.3
4	90,635	2454.4	− 2485	−30.6	× 40 / 178	−6.9
5	90,636	2438.3	− 2528	−89.7	× 27 / 178	−13.6
6	90,637	2502.5	− 2552	−49.5	× 28 / 178	−7.8
7	90,638	2465.6	− 2567	−101.4	× 21 / 178	−12
8	90,639	2501.3	− 2586	−84.7	× 30 / 178	−14.3
Sum, rounded to a whole point						−57

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,862	2395.6	− 2436	−40.4	× 21 / 152	−5.6
4	90,863	2432.8	− 2485	−52.2	× 25 / 152	−8.6
5	90,864	2449.6	− 2528	−78.4	× 26 / 152	−13.4
6	90,865	2499.7	− 2552	−52.3	× 29 / 152	−10
7	90,866	2493.2	− 2567	−73.8	× 27 / 152	−13.1
8	90,867	2476.8	− 2586	−109.2	× 24 / 152	−17.2
Sum, rounded to a whole point						−68

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,760	2402.2	− 2436	−33.8	× 20 / 137	−4.9
4	90,761	2440.7	− 2485	−44.3	× 21 / 137	−6.8
5	90,762	2452.4	− 2528	−75.6	× 27 / 137	−14.9
6	90,763	2486.1	− 2552	−65.9	× 28 / 137	−13.5
7	90,764	2514.4	− 2567	−52.6	× 13 / 137	−5
8	90,765	2481.5	− 2586	−104.5	× 28 / 137	−21.4
Sum, rounded to a whole point						−66

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,705	2391.4	− 2436	−44.6	× 25 / 116	−9.6
4	90,706	2428.5	− 2485	−56.5	× 22 / 116	−10.7
5	90,707	2440.8	− 2528	−87.2	× 19 / 116	−14.3
6	90,708	2470.9	− 2552	−81.1	× 23 / 116	−16.1
7	90,709	2473.6	− 2567	−93.4	× 14 / 116	−11.3
8	90,710	2469.8	− 2586	−116.2	× 13 / 116	−13
Sum, rounded to a whole point						−75

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,395	2346.0	− 2436	−90	× 18 / 93	−17.4
4	90,396	2413.1	− 2485	−71.9	× 25 / 93	−19.3
5	90,397	2440.4	− 2528	−87.6	× 21 / 93	−19.8
6	90,398	2478.0	− 2552	−74	× 14 / 93	−11.1
7	90,399	2450.0	− 2567	−117	× 15 / 93	−18.9
Sum, rounded to a whole point						−87

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,056	2386.6	− 2436	−49.4	× 16 / 107	−7.4
4	90,057	2390.7	− 2485	−94.3	× 19 / 107	−16.7
5	90,058	2460.5	− 2528	−67.5	× 28 / 107	−17.7
6	90,059	2448.1	− 2552	−103.9	× 19 / 107	−18.4
7	90,060	2496.6	− 2567	−70.4	× 12 / 107	−7.9
8	90,061	2545.0	− 2586	−41	× 13 / 107	−5
Sum, rounded to a whole point						−73

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −42, −45, −51, −53, −57, −68, −66, −75, −87, −73 → −61.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 3 · 2016→2017: 6 · 2017→2018: 2 · 2018→2019: 4 · 2019→2022: 11 · 2022→2023: 2 · 2023→2024: 9 · 2024→2025: 12 · 2025→2026: 14 → average 7
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7 × 2.66 = 18.6. Upper limit −43.1, lower limit −80.3.

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.