William W. Orr Elementary (Data source)
Source data for William W. Orr Elementary
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 |
||
| 3 | 758978 | 2425 | - | 2436 | = | -11 | * | (72 | / | 182) | = | -4.35164835 | ||
| 4 | 758981 | 2460 | - | 2485 | = | -25 | * | (60 | / | 182) | = | -8.24175823 | ||
| 5 | 758982 | 2493 | - | 2528 | = | -35 | * | (50 | / | 182) | = | -9.61538459 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for William W. Orr Elementary | -22 | ||||||||||||
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 |
||
| 3 | 23841 | 2438 | - | 2436 | = | 2 | * | (54 | / | 176) | = | 0.61363636 | ||
| 4 | 23843 | 2456 | - | 2485 | = | -29 | * | (69 | / | 176) | = | -11.36931817 | ||
| 5 | 23845 | 2526 | - | 2528 | = | -2 | * | (53 | / | 176) | = | -0.60227273 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for William W. Orr Elementary | -11 | ||||||||||||
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 |
||
| 3 | 24340 | 2434 | - | 2436 | = | -2 | * | (59 | / | 186) | = | -0.6344086 | ||
| 4 | 24341 | 2475 | - | 2485 | = | -10 | * | (56 | / | 186) | = | -3.01075268 | ||
| 5 | 24343 | 2514 | - | 2528 | = | -14 | * | (71 | / | 186) | = | -5.34408602 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for William W. Orr Elementary | -9 | ||||||||||||
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 |
||
| 3 | 24362 | 2457 | - | 2436 | = | 21 | * | (46 | / | 164) | = | 5.89024388 | ||
| 4 | 24364 | 2453 | - | 2485 | = | -32 | * | (61 | / | 164) | = | -11.90243901 | ||
| 5 | 24366 | 2511 | - | 2528 | = | -17 | * | (57 | / | 164) | = | -5.90853658 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for William W. Orr Elementary | -12 | ||||||||||||
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 |
||
| 3 | 24532 | 2438 | - | 2436 | = | 2 | * | (55 | / | 160) | = | 0.6875 | ||
| 4 | 24533 | 2471 | - | 2485 | = | -14 | * | (44 | / | 160) | = | -3.85 | ||
| 5 | 24534 | 2500 | - | 2528 | = | -28 | * | (61 | / | 160) | = | -10.675 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for William W. Orr Elementary | -14 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -22 | -11 | -9 | -12 | -14 | -68.0 | -13.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 1.4
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -28.6
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 | 71% | 76% | 75% | 78% | 71% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Little Lake City Elementary school district | County of Los Angeles
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.
William W. Orr Elementary math proficiency
Zero+ meets standard.
51% less $meal
61% less $meal
61% less $meal
61% less $meal
57% 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.
Elementary School (Public) schools in Little Lake City Elementary (7)
| Cresson Elementary | Jersey Avenue Elementary | Lakeland Elementary |
| Lakeview Elementary | Paddison Elementary | Studebaker Elementary |
| William W. Orr Elementary |