De Portola Middle (Data source)
Source data for De Portola 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 | 2275581 | 2552 | - | 2552 | = | 0 | * | (307 | / | 918) | = | 0.0 | ||
| 7 | 2275582 | 2575 | - | 2567 | = | 8 | * | (303 | / | 918) | = | 2.64052287 | ||
| 8 | 2275585 | 2596 | - | 2586 | = | 10 | * | (308 | / | 918) | = | 3.35511982 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for De Portola Middle | 6 | ||||||||||||
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 | 69770 | 2561 | - | 2552 | = | 9 | * | (305 | / | 913) | = | 3.00657173 | ||
| 7 | 69771 | 2564 | - | 2567 | = | -3 | * | (313 | / | 913) | = | -1.02847754 | ||
| 8 | 69773 | 2597 | - | 2586 | = | 11 | * | (295 | / | 913) | = | 3.55421686 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for De Portola Middle | 6 | ||||||||||||
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 | 71602 | 2568 | - | 2552 | = | 16 | * | (301 | / | 881) | = | 5.46651531 | ||
| 7 | 71604 | 2548 | - | 2567 | = | -19 | * | (296 | / | 881) | = | -6.38365492 | ||
| 8 | 71606 | 2605 | - | 2586 | = | 19 | * | (284 | / | 881) | = | 6.12485811 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for De Portola 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 | 71747 | 2569 | - | 2552 | = | 17 | * | (295 | / | 853) | = | 5.87924971 | ||
| 7 | 71750 | 2566 | - | 2567 | = | -1 | * | (280 | / | 853) | = | -0.32825322 | ||
| 8 | 71751 | 2583 | - | 2586 | = | -3 | * | (278 | / | 853) | = | -0.97772567 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for De Portola Middle | 5 | ||||||||||||
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 | 72233 | 2577 | - | 2552 | = | 25 | * | (299 | / | 831) | = | 8.9951865 | ||
| 7 | 72234 | 2578 | - | 2567 | = | 11 | * | (282 | / | 831) | = | 3.73285198 | ||
| 8 | 72235 | 2589 | - | 2586 | = | 3 | * | (250 | / | 831) | = | 0.90252707 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for De Portola Middle | 14 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 6 | 6 | 5 | 5 | 14 | 36.0 | 7.2 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 16.2
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -1.8
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 | 47% | 47% | 44% | 44% | 39% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
San Diego Unified school district | County of San Diego
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.
De Portola Middle math proficiency
Zero+ meets standard.
26% less $meal
29% less $meal
26% less $meal
27% less $meal
26% 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.