Mckinley Institute Of Technology: 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
6	83,564	2437.5	− 2552	−114.5	× 127 / 381	−38.2
7	83,567	2463.0	− 2567	−104	× 132 / 381	−36
8	83,568	2477.5	− 2586	−108.5	× 122 / 381	−34.7
Sum, rounded to a whole point						−109

2016 from sb_ca2016_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	77,505	2455.2	− 2552	−96.8	× 118 / 364	−31.4
7	77,507	2457.3	− 2567	−109.7	× 121 / 364	−36.5
8	77,509	2472.6	− 2586	−113.4	× 125 / 364	−38.9
Sum, rounded to a whole point						−107

2017 from sb_ca2017_1_csv_v2.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	79,641	2470.6	− 2552	−81.4	× 125 / 355	−28.7
7	79,643	2500.4	− 2567	−66.6	× 122 / 355	−22.9
8	79,646	2496.4	− 2586	−89.6	× 108 / 355	−27.3
Sum, rounded to a whole point						−79

2018 from sb_ca2018_1_csv_v3.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	79,779	2485.7	− 2552	−66.3	× 124 / 398	−20.7
7	79,781	2471.2	− 2567	−95.8	× 148 / 398	−35.6
8	79,783	2507.5	− 2586	−78.5	× 126 / 398	−24.9
Sum, rounded to a whole point						−81

2019 from sb_ca2019_1_csv_v4.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	80,280	2459.2	− 2552	−92.8	× 121 / 382	−29.4
7	80,281	2506.3	− 2567	−60.7	× 119 / 382	−18.9
8	80,282	2507.2	− 2586	−78.8	× 142 / 382	−29.3
Sum, rounded to a whole point						−78

2022 from sb_ca2022_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	80,510	2447.2	− 2552	−104.8	× 94 / 279	−35.3
7	80,511	2510.3	− 2567	−56.7	× 85 / 279	−17.3
8	80,512	2471.2	− 2586	−114.8	× 100 / 279	−41.1
Sum, rounded to a whole point						−94

2023 from sb_ca2023_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	80,476	2423.6	− 2552	−128.4	× 104 / 319	−41.9
7	80,477	2469.1	− 2567	−97.9	× 107 / 319	−32.8
8	80,478	2472.9	− 2586	−113.1	× 108 / 319	−38.3
Sum, rounded to a whole point						−113

2024 from sb_ca2024_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	80,494	2398.8	− 2552	−153.2	× 162 / 438	−56.7
7	80,495	2415.5	− 2567	−151.5	× 162 / 438	−56
8	80,496	2440.9	− 2586	−145.1	× 114 / 438	−37.8
Sum, rounded to a whole point						−150

2025 from sb_ca2025_1_csv_v1.zip

Grade	Line in file	Average score	Standard Met	Distance	Students	Weighted
6	80,152	2419.6	− 2552	−132.4	× 142 / 478	−39.3
7	80,153	2445.7	− 2567	−121.3	× 164 / 478	−41.6
8	80,154	2454.8	− 2586	−131.2	× 172 / 478	−47.2
Sum, rounded to a whole point						−128

Step 2 · The average and the normal range

Average: add the yearly results and divide by how many there are. −109, −107, −79, −81, −78, −94, −113, −150, −128 → −104.3
Typical year-to-year change: how far the result moved from each year to the next, ignoring up or down. 2015→2016: 2 · 2016→2017: 28 · 2017→2018: 2 · 2018→2019: 3 · 2019→2022: 16 · 2022→2023: 19 · 2023→2024: 37 · 2024→2025: 22 → average 16.1
Normal range: multiply the typical change by 2.66, then add it to the average and subtract it. 16.1 × 2.66 = 42.8. Upper limit −61.5, lower limit −147.1.

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.