Jack London 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 scores 52 points under the grade 3 bar. 2384 vs. 2436.
4th The average 4th grader scores 12 points under the grade 3 bar. 2424 vs. 2436. The 4th-grade bar is 2485.
5th The average 5th grader scores 35 points under the grade 4 bar. 2450 vs. 2485. The 5th-grade bar is 2528.
6th The average 6th grader scores 24 points under the grade 4 bar. 2461 vs. 2485. 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	94,865	2405.3	− 2436	−30.7	× 69 / 208	−10.2
4	94,867	2439.4	− 2485	−45.6	× 54 / 208	−11.8
5	94,868	2452.1	− 2528	−75.9	× 55 / 208	−20.1
6	94,871	2454.4	− 2552	−97.6	× 30 / 208	−14.1
Sum, rounded to a whole point						−56

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	88,096	2395.5	− 2436	−40.5	× 44 / 205	−8.7
4	88,098	2439.2	− 2485	−45.8	× 73 / 205	−16.3
5	88,099	2432.1	− 2528	−95.9	× 60 / 205	−28.1
6	88,102	2414.4	− 2552	−137.6	× 28 / 205	−18.8
Sum, rounded to a whole point						−72

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,644	2402.3	− 2436	−33.7	× 36 / 196	−6.2
4	90,647	2446.5	− 2485	−38.5	× 39 / 196	−7.7
5	90,648	2450.9	− 2528	−77.1	× 70 / 196	−27.5
6	90,650	2432.6	− 2552	−119.4	× 51 / 196	−31.1
Sum, rounded to a whole point						−72

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,850	2403.5	− 2436	−32.5	× 47 / 182	−8.4
4	90,851	2441.0	− 2485	−44	× 36 / 182	−8.7
5	90,854	2473.6	− 2528	−54.4	× 41 / 182	−12.3
6	90,855	2463.2	− 2552	−88.8	× 58 / 182	−28.3
Sum, rounded to a whole point						−58

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,484	2401.8	− 2436	−34.2	× 43 / 159	−9.2
4	91,485	2451.5	− 2485	−33.5	× 44 / 159	−9.3
5	91,486	2461.6	− 2528	−66.4	× 32 / 159	−13.4
6	91,487	2472.7	− 2552	−79.3	× 40 / 159	−19.9
Sum, rounded to a whole point						−52

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,726	2429.6	− 2436	−6.4	× 32 / 154	−1.3
4	91,727	2431.5	− 2485	−53.5	× 31 / 154	−10.8
5	91,728	2419.5	− 2528	−108.5	× 50 / 154	−35.2
6	91,729	2472.7	− 2552	−79.3	× 41 / 154	−21.1
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	91,620	2374.9	− 2436	−61.1	× 32 / 145	−13.5
4	91,621	2439.3	− 2485	−45.7	× 34 / 145	−10.7
5	91,622	2458.9	− 2528	−69.1	× 37 / 145	−17.6
6	91,623	2449.5	− 2552	−102.5	× 42 / 145	−29.7
Sum, rounded to a whole point						−72

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,563	2380.5	− 2436	−55.5	× 46 / 144	−17.7
4	91,564	2419.1	− 2485	−65.9	× 34 / 144	−15.6
5	91,565	2443.8	− 2528	−84.2	× 30 / 144	−17.5
6	91,566	2468.2	− 2552	−83.8	× 34 / 144	−19.8
Sum, rounded to a whole point						−71

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	91,267	2408.2	− 2436	−27.8	× 38 / 149	−7.1
4	91,268	2435.0	− 2485	−50	× 45 / 149	−15.1
5	91,269	2425.8	− 2528	−102.2	× 34 / 149	−23.3
6	91,270	2499.4	− 2552	−52.6	× 32 / 149	−11.3
Sum, rounded to a whole point						−57

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	90,918	2383.8	− 2436	−52.2	× 39 / 155	−13.1
4	90,919	2424.2	− 2485	−60.8	× 39 / 155	−15.3
5	90,920	2450.3	− 2528	−77.7	× 40 / 155	−20.1
6	90,921	2461.1	− 2552	−90.9	× 37 / 155	−21.7
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. −56, −72, −72, −58, −52, −68, −72, −71, −57, −70 → −64.8
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 16 · 2016→2017: 0 · 2017→2018: 14 · 2018→2019: 6 · 2019→2022: 16 · 2022→2023: 4 · 2023→2024: 1 · 2024→2025: 14 · 2025→2026: 13 → average 9.3
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 9.3 × 2.66 = 24.7. Upper limit −40.1, lower limit −89.5.

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.