iLEAD Lancaster 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.

3rd The average 3rd grader scores 80 points under the grade 3 bar. 2356 vs. 2436.
4th The average 4th grader scores 49 points under the grade 3 bar. 2387 vs. 2436. The 4th-grade bar is 2485.
5th The average 5th grader scores 51 points under the grade 3 bar. 2385 vs. 2436. The 5th-grade bar is 2528.
6th The average 6th grader scores 28 points under the grade 3 bar. 2408 vs. 2436. The 6th-grade bar is 2552.
7th The average 7th grader scores just under the grade 3 bar. 2435 vs. 2436. The 7th-grade bar is 2567.
8th The average 8th grader scores 24 points under the grade 4 bar. 2462 vs. 2485. 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	25,019	2330.6	− 2436	−105.4	× 58 / 250	−24.5
4	25,021	2377.0	− 2485	−108	× 55 / 250	−23.8
5	25,023	2417.6	− 2528	−110.4	× 59 / 250	−26.1
6	25,025	2430.1	− 2552	−121.9	× 54 / 250	−26.3
7	25,027	2433.5	− 2567	−133.5	× 24 / 250	−12.8
Sum, rounded to a whole point						−113

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,292	2360.2	− 2436	−75.8	× 79 / 323	−18.5
4	23,293	2384.5	− 2485	−100.5	× 54 / 323	−16.8
5	23,296	2405.8	− 2528	−122.2	× 52 / 323	−19.7
6	23,298	2426.5	− 2552	−125.5	× 60 / 323	−23.3
7	23,300	2470.1	− 2567	−96.9	× 53 / 323	−15.9
8	23,302	2478.6	− 2586	−107.4	× 25 / 323	−8.3
Sum, rounded to a whole point						−103

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,746	2362.7	− 2436	−73.3	× 78 / 411	−13.9
4	23,747	2381.1	− 2485	−103.9	× 74 / 411	−18.7
5	23,750	2401.8	− 2528	−126.2	× 57 / 411	−17.5
6	23,751	2396.3	− 2552	−155.7	× 60 / 411	−22.7
7	23,754	2430.3	− 2567	−136.7	× 76 / 411	−25.3
8	23,756	2454.0	− 2586	−132	× 66 / 411	−21.2
Sum, rounded to a whole point						−119

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,764	2346.8	− 2436	−89.2	× 86 / 447	−17.2
4	23,766	2392.3	− 2485	−92.7	× 72 / 447	−14.9
5	23,768	2415.6	− 2528	−112.4	× 73 / 447	−18.4
6	23,770	2439.3	− 2552	−112.7	× 72 / 447	−18.2
7	23,772	2414.5	− 2567	−152.5	× 64 / 447	−21.8
8	23,774	2438.7	− 2586	−147.3	× 80 / 447	−26.4
Sum, rounded to a whole point						−117

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,940	2371.5	− 2436	−64.5	× 75 / 443	−10.9
4	23,941	2383.0	− 2485	−102	× 78 / 443	−18
5	23,942	2416.7	− 2528	−111.3	× 83 / 443	−20.9
6	23,943	2436.3	− 2552	−115.7	× 81 / 443	−21.2
7	23,944	2442.6	− 2567	−124.4	× 62 / 443	−17.4
8	23,945	2448.3	− 2586	−137.7	× 64 / 443	−19.9
Sum, rounded to a whole point						−108

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,877	2360.5	− 2436	−75.5	× 76 / 491	−11.7
4	23,878	2375.6	− 2485	−109.4	× 80 / 491	−17.8
5	23,879	2391.7	− 2528	−136.3	× 87 / 491	−24.2
6	23,880	2430.1	− 2552	−121.9	× 76 / 491	−18.9
7	23,881	2424.6	− 2567	−142.4	× 92 / 491	−26.7
8	23,882	2423.8	− 2586	−162.2	× 80 / 491	−26.4
Sum, rounded to a whole point						−126

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,842	2365.2	− 2436	−70.8	× 80 / 499	−11.4
4	23,843	2377.7	− 2485	−107.3	× 75 / 499	−16.1
5	23,844	2417.4	− 2528	−110.6	× 80 / 499	−17.7
6	23,845	2403.2	− 2552	−148.8	× 84 / 499	−25
7	23,846	2451.6	− 2567	−115.4	× 86 / 499	−19.9
8	23,847	2435.3	− 2586	−150.7	× 94 / 499	−28.4
Sum, rounded to a whole point						−119

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,692	2359.9	− 2436	−76.1	× 74 / 493	−11.4
4	23,693	2404.9	− 2485	−80.1	× 79 / 493	−12.8
5	23,694	2389.3	− 2528	−138.7	× 73 / 493	−20.5
6	23,695	2411.6	− 2552	−140.4	× 89 / 493	−25.3
7	23,696	2425.6	− 2567	−141.4	× 92 / 493	−26.4
8	23,697	2446.3	− 2586	−139.7	× 86 / 493	−24.4
Sum, rounded to a whole point						−121

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,587	2356.9	− 2436	−79.1	× 80 / 499	−12.7
4	23,588	2387.4	− 2485	−97.6	× 84 / 499	−16.4
5	23,589	2396.7	− 2528	−131.3	× 84 / 499	−22.1
6	23,590	2431.5	− 2552	−120.5	× 79 / 499	−19.1
7	23,591	2419.7	− 2567	−147.3	× 83 / 499	−24.5
8	23,592	2445.1	− 2586	−140.9	× 89 / 499	−25.1
Sum, rounded to a whole point						−120

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	23,627	2356.0	− 2436	−80	× 77 / 480	−12.8
4	23,628	2387.1	− 2485	−97.9	× 80 / 480	−16.3
5	23,629	2385.3	− 2528	−142.7	× 82 / 480	−24.4
6	23,630	2408.1	− 2552	−143.9	× 83 / 480	−24.9
7	23,631	2434.6	− 2567	−132.4	× 84 / 480	−23.2
8	23,632	2461.5	− 2586	−124.5	× 74 / 480	−19.2
Sum, rounded to a whole point						−121

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −113, −103, −119, −117, −108, −126, −119, −121, −120, −121 → −116.7
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 10 · 2016→2017: 16 · 2017→2018: 2 · 2018→2019: 9 · 2019→2022: 18 · 2022→2023: 7 · 2023→2024: 2 · 2024→2025: 1 · 2025→2026: 1 → average 7.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 7.3 × 2.66 = 19.4. Upper limit −97.3, lower limit −136.1.

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.