Charleston Elementary: 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 6.

3rd The average 3rd grader meets the grade 3 bar. 2499 vs. 2436.
4th The average 4th grader scores just under the grade 3 bar. 2427 vs. 2436. The 4th-grade bar is 2485.
5th The average 5th grader scores 41 points under the grade 5 bar. 2487 vs. 2528.
6th The average 6th grader scores 19 points under the grade 5 bar. 2509 vs. 2528. The 6th-grade bar is 2552.

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	44,254	2412.0	− 2436	−24	× 55 / 215	−6.1
4	44,255	2480.2	− 2485	−4.8	× 49 / 215	−1.1
5	44,258	2476.5	− 2528	−51.5	× 54 / 215	−12.9
6	44,259	2527.1	− 2552	−24.9	× 57 / 215	−6.6
Sum, rounded to a whole point						−27

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	40,953	2402.5	− 2436	−33.5	× 55 / 220	−8.4
4	40,956	2462.1	− 2485	−22.9	× 63 / 220	−6.6
5	40,958	2469.4	− 2528	−58.6	× 48 / 220	−12.8
6	40,960	2525.1	− 2552	−26.9	× 54 / 220	−6.6
Sum, rounded to a whole point						−34

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,963	2434.5	− 2436	−1.5	× 51 / 214	−0.4
4	41,964	2460.5	− 2485	−24.5	× 54 / 214	−6.2
5	41,967	2487.6	− 2528	−40.4	× 57 / 214	−10.8
6	41,968	2539.1	− 2552	−12.9	× 52 / 214	−3.1
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	41,983	2433.5	− 2436	−2.5	× 55 / 240	−0.6
4	41,986	2485.5	− 2485	0.5	× 64 / 240	0.1
5	41,987	2509.2	− 2528	−18.8	× 61 / 240	−4.8
6	41,990	2513.5	− 2552	−38.5	× 60 / 240	−9.6
Sum, rounded to a whole point						−15

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	42,126	2438.3	− 2436	2.3	× 52 / 226	0.5
4	42,127	2492.5	− 2485	7.5	× 50 / 226	1.7
5	42,128	2501.9	− 2528	−26.1	× 63 / 226	−7.3
6	42,129	2532.8	− 2552	−19.2	× 61 / 226	−5.2
Sum, rounded to a whole point						−10

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,895	2412.3	− 2436	−23.7	× 60 / 214	−6.6
4	41,896	2467.4	− 2485	−17.6	× 50 / 214	−4.1
5	41,897	2453.5	− 2528	−74.5	× 51 / 214	−17.8
6	41,898	2494.3	− 2552	−57.7	× 53 / 214	−14.3
Sum, rounded to a whole point						−43

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,920	2420.2	− 2436	−15.8	× 54 / 218	−3.9
4	41,921	2464.1	− 2485	−20.9	× 61 / 218	−5.8
5	41,922	2453.8	− 2528	−74.2	× 57 / 218	−19.4
6	41,923	2476.6	− 2552	−75.4	× 46 / 218	−15.9
Sum, rounded to a whole point						−45

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,751	2439.4	− 2436	3.4	× 37 / 221	0.6
4	41,752	2460.5	− 2485	−24.5	× 59 / 221	−6.5
5	41,753	2471.6	− 2528	−56.4	× 66 / 221	−16.8
6	41,754	2496.1	− 2552	−55.9	× 59 / 221	−14.9
Sum, rounded to a whole point						−38

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,510	2408.0	− 2436	−28	× 52 / 219	−6.6
4	41,511	2458.7	− 2485	−26.3	× 45 / 219	−5.4
5	41,512	2467.0	− 2528	−61	× 60 / 219	−16.7
6	41,513	2513.0	− 2552	−39	× 62 / 219	−11
Sum, rounded to a whole point						−40

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	41,416	2499.2	− 2436	63.2	× 52 / 205	16
4	41,417	2427.4	− 2485	−57.6	× 53 / 205	−14.9
5	41,418	2486.9	− 2528	−41.1	× 44 / 205	−8.8
6	41,419	2508.6	− 2552	−43.4	× 56 / 205	−11.9
Sum, rounded to a whole point						−20

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −27, −34, −20, −15, −10, −43, −45, −38, −40, −20 → −29.2
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 7 · 2016→2017: 14 · 2017→2018: 5 · 2018→2019: 5 · 2019→2022: 33 · 2022→2023: 2 · 2023→2024: 7 · 2024→2025: 2 · 2025→2026: 20 → average 10.6
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 10.6 × 2.66 = 28.2. Upper limit −1, lower limit −57.4.

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.