Henderson 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 3 bar

The state's math test uses one scale for every grade, so a score means the same thing in grade 3 as in grade 4.

3rd The average 3rd grader scores 66 points under the grade 3 bar. 2370 vs. 2436.
4th The average 4th grader scores 24 points under the grade 3 bar. 2412 vs. 2436. The 4th-grade bar is 2485.

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	64,621	2400.5	− 2436	−35.5	× 113 / 331	−12.1
4	64,622	2454.9	− 2485	−30.1	× 88 / 331	−8
5	64,625	2490.3	− 2528	−37.7	× 73 / 331	−8.3
6	64,627	2497.9	− 2552	−54.1	× 57 / 331	−9.3
Sum, rounded to a whole point						−38

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	59,939	2382.2	− 2436	−53.8	× 91 / 334	−14.7
4	59,941	2436.9	− 2485	−48.1	× 116 / 334	−16.7
5	59,944	2504.6	− 2528	−23.4	× 59 / 334	−4.1
6	59,945	2497.9	− 2552	−54.1	× 68 / 334	−11
Sum, rounded to a whole point						−47

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,670	2381.8	− 2436	−54.2	× 110 / 359	−16.6
4	61,671	2449.2	− 2485	−35.8	× 98 / 359	−9.8
5	61,673	2458.8	− 2528	−69.2	× 93 / 359	−17.9
6	61,675	2502.2	− 2552	−49.8	× 58 / 359	−8
Sum, rounded to a whole point						−52

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,761	2371.5	− 2436	−64.5	× 109 / 354	−19.9
4	61,763	2444.3	− 2485	−40.7	× 93 / 354	−10.7
5	61,765	2468.6	− 2528	−59.4	× 72 / 354	−12.1
6	61,767	2480.0	− 2552	−72	× 80 / 354	−16.3
Sum, rounded to a whole point						−59

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,031	2383.9	− 2436	−52.1	× 94 / 353	−13.9
4	62,032	2447.2	− 2485	−37.8	× 108 / 353	−11.6
5	62,033	2444.9	− 2528	−83.1	× 81 / 353	−19.1
6	62,034	2440.3	− 2552	−111.7	× 70 / 353	−22.2
Sum, rounded to a whole point						−67

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	60,652	2340.6	− 2436	−95.4	× 79 / 279	−27
4	60,653	2391.1	− 2485	−93.9	× 87 / 279	−29.3
5	60,654	2399.9	− 2528	−128.1	× 49 / 279	−22.5
6	60,655	2394.4	− 2552	−157.6	× 64 / 279	−36.2
Sum, rounded to a whole point						−115

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,120	2366.2	− 2436	−69.8	× 72 / 269	−18.7
4	62,121	2438.8	− 2485	−46.2	× 80 / 269	−13.7
5	62,122	2447.4	− 2528	−80.6	× 59 / 269	−17.7
6	62,123	2403.4	− 2552	−148.6	× 58 / 269	−32
Sum, rounded to a whole point						−82

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,058	2360.3	− 2436	−75.7	× 89 / 288	−23.4
4	62,059	2443.0	− 2485	−42	× 65 / 288	−9.5
5	62,060	2406.7	− 2528	−121.3	× 59 / 288	−24.8
6	62,061	2428.3	− 2552	−123.7	× 75 / 288	−32.2
Sum, rounded to a whole point						−90

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,012	2366.2	− 2436	−69.8	× 85 / 248	−23.9
4	62,013	2411.7	− 2485	−73.3	× 104 / 248	−30.7
5	62,014	2451.1	− 2528	−76.9	× 59 / 248	−18.3
Sum, rounded to a whole point						−73

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,776	2361.8	− 2436	−74.2	× 87 / 167	−38.7
4	61,777	2382.9	− 2485	−102.1	× 80 / 167	−48.9
Sum, rounded to a whole point						−88

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	61,751	2370.3	− 2436	−65.7	× 63 / 152	−27.2
4	61,752	2411.8	− 2485	−73.2	× 89 / 152	−42.9
Sum, rounded to a whole point						−70

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −38, −47, −52, −59, −67, −115, −82, −90, −73, −88, −70 → −71
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 9 · 2016→2017: 5 · 2017→2018: 7 · 2018→2019: 8 · 2019→2021: 48 · 2021→2022: 33 · 2022→2023: 8 · 2023→2024: 17 · 2024→2025: 15 · 2025→2026: 18 → average 16.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 16.8 × 2.66 = 44.7. Upper limit −26.3, lower limit −115.7.

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.