Aptos Middle (Data source)
Source data for Aptos Middle
2015
| Step 1 | Step 2 | Step 3 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Get Mean Scale Score from line numbers in this data file. | Subtract 'met min' Scale Score. from Mean Scale Score to get Distance From Standard | Multiply Distance From Standard by proportion of students in grade. | ||||||||||||
| Grade | Line number |
Mean Scale Score |
- | Scale Score: met min |
= | Distance from standard |
* | (Students tested in grade |
/ | Students) tested in school |
= | Weighted Distance From Standard |
||
| 6 | 2377122 | 2507 | - | 2552 | = | -45 | * | (316 | / | 1039) | = | -13.68623673 | ||
| 7 | 2377125 | 2531 | - | 2567 | = | -36 | * | (352 | / | 1039) | = | -12.19634262 | ||
| 8 | 2377126 | 2569 | - | 2586 | = | -17 | * | (371 | / | 1039) | = | -6.07025985 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Aptos Middle | -32 | ||||||||||||
2016
| Step 1 | Step 2 | Step 3 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Get Mean Scale Score from line numbers in this data file. | Subtract 'met min' Scale Score. from Mean Scale Score to get Distance From Standard | Multiply Distance From Standard by proportion of students in grade. | ||||||||||||
| Grade | Line number |
Mean Scale Score |
- | Scale Score: met min |
= | Distance from standard |
* | (Students tested in grade |
/ | Students) tested in school |
= | Weighted Distance From Standard |
||
| 6 | 72598 | 2531 | - | 2552 | = | -21 | * | (326 | / | 983) | = | -6.9643947 | ||
| 7 | 72599 | 2543 | - | 2567 | = | -24 | * | (320 | / | 983) | = | -7.8128179 | ||
| 8 | 72602 | 2579 | - | 2586 | = | -7 | * | (337 | / | 983) | = | -2.39979654 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Aptos Middle | -17 | ||||||||||||
2017
| Step 1 | Step 2 | Step 3 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Get Mean Scale Score from line numbers in this data file. | Subtract 'met min' Scale Score. from Mean Scale Score to get Distance From Standard | Multiply Distance From Standard by proportion of students in grade. | ||||||||||||
| Grade | Line number |
Mean Scale Score |
- | Scale Score: met min |
= | Distance from standard |
* | (Students tested in grade |
/ | Students) tested in school |
= | Weighted Distance From Standard |
||
| 6 | 74569 | 2538 | - | 2552 | = | -14 | * | (326 | / | 955) | = | -4.77905758 | ||
| 7 | 74571 | 2579 | - | 2567 | = | 12 | * | (323 | / | 955) | = | 4.05863874 | ||
| 8 | 74574 | 2572 | - | 2586 | = | -14 | * | (306 | / | 955) | = | -4.48586387 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Aptos Middle | -5 | ||||||||||||
2018
| Step 1 | Step 2 | Step 3 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Get Mean Scale Score from line numbers in this data file. | Subtract 'met min' Scale Score. from Mean Scale Score to get Distance From Standard | Multiply Distance From Standard by proportion of students in grade. | ||||||||||||
| Grade | Line number |
Mean Scale Score |
- | Scale Score: met min |
= | Distance from standard |
* | (Students tested in grade |
/ | Students) tested in school |
= | Weighted Distance From Standard |
||
| 6 | 74743 | 2536 | - | 2552 | = | -16 | * | (291 | / | 911) | = | -5.11086717 | ||
| 7 | 74746 | 2567 | - | 2567 | = | 0 | * | (307 | / | 911) | = | 0.0 | ||
| 8 | 74747 | 2609 | - | 2586 | = | 23 | * | (313 | / | 911) | = | 7.90230516 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Aptos Middle | 3 | ||||||||||||
2019
| Step 1 | Step 2 | Step 3 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Get Mean Scale Score from line numbers in this data file. | Subtract 'met min' Scale Score. from Mean Scale Score to get Distance From Standard | Multiply Distance From Standard by proportion of students in grade. | ||||||||||||
| Grade | Line number |
Mean Scale Score |
- | Scale Score: met min |
= | Distance from standard |
* | (Students tested in grade |
/ | Students) tested in school |
= | Weighted Distance From Standard |
||
| 6 | 75269 | 2520 | - | 2552 | = | -32 | * | (316 | / | 935) | = | -10.81497325 | ||
| 7 | 75270 | 2570 | - | 2567 | = | 3 | * | (305 | / | 935) | = | 0.97860962 | ||
| 8 | 75271 | 2587 | - | 2586 | = | 1 | * | (314 | / | 935) | = | 0.33582888 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Aptos Middle | -10 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -32 | -17 | -5 | 3 | -10 | -61.0 | -12.2 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 26.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -51.2
For the lines, you have the data necessary to plot the chart.
Very last step
The percent of students getting a Free or Reduced Price Meal comes from the following sources:
| 2015 | 2016 | 2017 | 2018 | 2019 | |
|---|---|---|---|---|---|
| Percent | 70% | 59% | 56% | 52% | 55% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
San Francisco Unified school district | County of San Francisco
THIS chart shows what the school system "wants"
PLUS a "special" or "outside" cause of variation: wealth/poverty.
NOT what teachers want.
NOT what principals want.
NOT what parents want.
Aptos Middle math proficiency
Zero+ meets standard.
51% less $meal
46% less $meal
43% less $meal
42% less $meal
43% less $meal
• Any result above zero is proficient; below is not proficient. • There is a 99% chance that results will remain the same in coming years, which is to say, between the Upper and Lower Control Limits (the gray lines). • The houses with the % of students receiving a Free or Reduced Price Meal is a measure of wealth/poverty.