Ione Junior High: 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 4 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 8.

6th The average 6th grader scores 10 points under the grade 4 bar. 2475 vs. 2485. The 6th-grade bar is 2552.
7th The average 7th grader scores 12 points under the grade 4 bar. 2473 vs. 2485. The 7th-grade bar is 2567.
8th The average 8th grader scores 38 points under the grade 4 bar. 2447 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
6	4,189	2500.2	− 2552	−51.8	× 66 / 310	−11
7	4,190	2475.3	− 2567	−91.7	× 132 / 310	−39
8	4,193	2499.3	− 2586	−86.7	× 112 / 310	−31.3
Sum, rounded to a whole point						−81

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	3,694	2516.0	− 2552	−36	× 81 / 336	−8.7
7	3,696	2508.3	− 2567	−58.7	× 120 / 336	−21
8	3,699	2487.8	− 2586	−98.2	× 135 / 336	−39.5
Sum, rounded to a whole point						−69

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	3,782	2460.1	− 2552	−91.9	× 74 / 314	−21.7
7	3,785	2509.0	− 2567	−58	× 111 / 314	−20.5
8	3,787	2506.4	− 2586	−79.6	× 129 / 314	−32.7
Sum, rounded to a whole point						−75

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	3,785	2432.5	− 2552	−119.5	× 78 / 328	−28.4
7	3,786	2454.8	− 2567	−112.2	× 136 / 328	−46.5
8	3,789	2513.8	− 2586	−72.2	× 114 / 328	−25.1
Sum, rounded to a whole point						−100

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	3,822	2433.0	− 2552	−119	× 83 / 370	−26.7
7	3,823	2476.8	− 2567	−90.2	× 135 / 370	−32.9
8	3,824	2478.0	− 2586	−108	× 152 / 370	−44.4
Sum, rounded to a whole point						−104

2021 from sb_ca2021_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	3,666	2458.9	− 2552	−93.1	× 65 / 342	−17.7
7	3,667	2475.2	− 2567	−91.8	× 144 / 342	−38.7
8	3,668	2459.4	− 2586	−126.6	× 133 / 342	−49.2
Sum, rounded to a whole point						−106

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	3,702	2472.2	− 2552	−79.8	× 80 / 347	−18.4
7	3,703	2490.0	− 2567	−77	× 126 / 347	−28
8	3,704	2473.0	− 2586	−113	× 141 / 347	−45.9
Sum, rounded to a whole point						−92

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	3,686	2466.2	− 2552	−85.8	× 77 / 370	−17.9
7	3,687	2494.9	− 2567	−72.1	× 162 / 370	−31.6
8	3,688	2497.4	− 2586	−88.6	× 131 / 370	−31.4
Sum, rounded to a whole point						−81

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	3,652	2406.4	− 2552	−145.6	× 85 / 383	−32.3
7	3,653	2480.1	− 2567	−86.9	× 137 / 383	−31.1
8	3,654	2465.8	− 2586	−120.2	× 161 / 383	−50.5
Sum, rounded to a whole point						−114

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	3,612	2462.0	− 2552	−90	× 66 / 360	−16.5
7	3,613	2440.3	− 2567	−126.7	× 159 / 360	−56
8	3,614	2499.8	− 2586	−86.2	× 135 / 360	−32.3
Sum, rounded to a whole point						−105

2026 from sb_ca2026_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	3,588	2474.7	− 2552	−77.3	× 88 / 369	−18.4
7	3,589	2473.2	− 2567	−93.8	× 138 / 369	−35.1
8	3,590	2446.8	− 2586	−139.2	× 143 / 369	−53.9
Sum, rounded to a whole point						−107

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −81, −69, −75, −100, −104, −106, −92, −81, −114, −105, −107 → −94
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 12 · 2016→2017: 6 · 2017→2018: 25 · 2018→2019: 4 · 2019→2021: 2 · 2021→2022: 14 · 2022→2023: 11 · 2023→2024: 33 · 2024→2025: 9 · 2025→2026: 2 → average 11.8
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 11.8 × 2.66 = 31.4. Upper limit −62.6, 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.