Preston Elementary (Data source)
Source data for Preston 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 | 2032035 | 2381 | - | 2436 | = | -55 | * | (106 | / | 283) | = | -20.60070667 | ||
| 4 | 2032036 | 2410 | - | 2485 | = | -75 | * | (101 | / | 283) | = | -26.76678443 | ||
| 5 | 2032039 | 2440 | - | 2528 | = | -88 | * | (76 | / | 283) | = | -23.63250877 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Preston Elementary | -71 | ||||||||||||
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 | 62447 | 2396 | - | 2436 | = | -40 | * | (87 | / | 294) | = | -11.83673468 | ||
| 4 | 62449 | 2404 | - | 2485 | = | -81 | * | (108 | / | 294) | = | -29.75510198 | ||
| 5 | 62451 | 2430 | - | 2528 | = | -98 | * | (99 | / | 294) | = | -32.99999991 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Preston Elementary | -75 | ||||||||||||
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 | 64238 | 2388 | - | 2436 | = | -48 | * | (107 | / | 297) | = | -17.29292928 | ||
| 4 | 64241 | 2422 | - | 2485 | = | -63 | * | (92 | / | 297) | = | -19.51515147 | ||
| 5 | 64243 | 2427 | - | 2528 | = | -101 | * | (98 | / | 297) | = | -33.32659923 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Preston Elementary | -70 | ||||||||||||
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 | 64346 | 2381 | - | 2436 | = | -55 | * | (91 | / | 286) | = | -17.49999999 | ||
| 4 | 64348 | 2421 | - | 2485 | = | -64 | * | (106 | / | 286) | = | -23.72027968 | ||
| 5 | 64350 | 2441 | - | 2528 | = | -87 | * | (89 | / | 286) | = | -27.07342656 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Preston Elementary | -68 | ||||||||||||
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 | 64713 | 2380 | - | 2436 | = | -56 | * | (106 | / | 292) | = | -20.32876709 | ||
| 4 | 64714 | 2417 | - | 2485 | = | -68 | * | (88 | / | 292) | = | -20.49315068 | ||
| 5 | 64715 | 2456 | - | 2528 | = | -72 | * | (98 | / | 292) | = | -24.16438354 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Preston Elementary | -65 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -71 | -75 | -70 | -68 | -65 | -349.0 | -69.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -60.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -78.8
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 | 86% | 89% | 88% | 91% | 93% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Rialto Unified school district | County of San Bernardino
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.
Preston Elementary math proficiency
Zero+ meets standard.
77% less $meal
79% less $meal
79% less $meal
82% less $meal
82% 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.