Juanita Blakely Jones 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.

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	67,635	2352.0	− 2436	−84	× 70 / 253	−23.2
4	67,637	2382.0	− 2485	−103	× 68 / 253	−27.7
5	67,639	2413.4	− 2528	−114.6	× 61 / 253	−27.6
6	67,641	2459.4	− 2552	−92.6	× 54 / 253	−19.8
Sum, rounded to a whole point						−98

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	62,680	2366.8	− 2436	−69.2	× 65 / 213	−21.1
4	62,682	2421.5	− 2485	−63.5	× 47 / 213	−14
5	62,684	2431.4	− 2528	−96.6	× 50 / 213	−22.7
6	62,686	2461.4	− 2552	−90.6	× 51 / 213	−21.7
Sum, rounded to a whole point						−79

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,474	2383.3	− 2436	−52.7	× 49 / 208	−12.4
4	64,475	2446.7	− 2485	−38.3	× 64 / 208	−11.8
5	64,478	2460.5	− 2528	−67.5	× 46 / 208	−14.9
6	64,479	2476.1	− 2552	−75.9	× 49 / 208	−17.9
Sum, rounded to a whole point						−57

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,581	2410.8	− 2436	−25.2	× 69 / 228	−7.6
4	64,582	2468.5	− 2485	−16.5	× 58 / 228	−4.2
5	64,585	2478.2	− 2528	−49.8	× 53 / 228	−11.6
6	64,586	2460.9	− 2552	−91.1	× 48 / 228	−19.2
Sum, rounded to a whole point						−43

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,949	2405.6	− 2436	−30.4	× 63 / 209	−9.2
4	64,950	2464.0	− 2485	−21	× 51 / 209	−5.1
5	64,951	2443.9	− 2528	−84.1	× 44 / 209	−17.7
6	64,952	2477.2	− 2552	−74.8	× 51 / 209	−18.3
Sum, rounded to a whole point						−50

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,034	2317.6	− 2436	−118.4	× 51 / 231	−26.1
4	65,035	2400.1	− 2485	−84.9	× 73 / 231	−26.8
5	65,036	2416.2	− 2528	−111.8	× 49 / 231	−23.7
6	65,037	2470.1	− 2552	−81.9	× 58 / 231	−20.6
Sum, rounded to a whole point						−97

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	65,029	2344.7	− 2436	−91.3	× 59 / 220	−24.5
4	65,030	2390.9	− 2485	−94.1	× 54 / 220	−23.1
5	65,031	2450.6	− 2528	−77.4	× 70 / 220	−24.6
6	65,032	2452.8	− 2552	−99.2	× 37 / 220	−16.7
Sum, rounded to a whole point						−89

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,995	2350.1	− 2436	−85.9	× 49 / 227	−18.5
4	64,996	2358.9	− 2485	−126.1	× 61 / 227	−33.9
5	64,997	2395.1	− 2528	−132.9	× 51 / 227	−29.9
6	64,998	2472.1	− 2552	−79.9	× 66 / 227	−23.2
Sum, rounded to a whole point						−106

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
3	64,753	2366.4	− 2436	−69.6	× 57 / 205	−19.4
4	64,754	2376.3	− 2485	−108.7	× 48 / 205	−25.5
5	64,755	2406.4	− 2528	−121.6	× 57 / 205	−33.8
6	64,756	2425.1	− 2552	−126.9	× 43 / 205	−26.6
Sum, rounded to a whole point						−105

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −98, −79, −57, −43, −50, −97, −89, −106, −105 → −80.4
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 19 · 2016→2017: 22 · 2017→2018: 14 · 2018→2019: 7 · 2019→2022: 47 · 2022→2023: 8 · 2023→2024: 17 · 2024→2025: 1 → average 16.9
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 16.9 × 2.66 = 45. Upper limit −35.4, lower limit −125.4.

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.