Trapp Elementary (Data source)
Source data for Trapp 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 | 2032309 | 2407 | - | 2436 | = | -29 | * | (76 | / | 237) | = | -9.29957805 | ||
| 4 | 2032310 | 2453 | - | 2485 | = | -32 | * | (90 | / | 237) | = | -12.15189872 | ||
| 5 | 2032313 | 2436 | - | 2528 | = | -92 | * | (71 | / | 237) | = | -27.56118143 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Trapp Elementary | -49 | ||||||||||||
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 | 62454 | 2428 | - | 2436 | = | -8 | * | (77 | / | 238) | = | -2.58823529 | ||
| 4 | 62456 | 2456 | - | 2485 | = | -29 | * | (74 | / | 238) | = | -9.0168067 | ||
| 5 | 62458 | 2483 | - | 2528 | = | -45 | * | (87 | / | 238) | = | -16.44957981 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Trapp Elementary | -28 | ||||||||||||
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 | 64246 | 2432 | - | 2436 | = | -4 | * | (78 | / | 221) | = | -1.4117647 | ||
| 4 | 64249 | 2481 | - | 2485 | = | -4 | * | (77 | / | 221) | = | -1.39366516 | ||
| 5 | 64251 | 2491 | - | 2528 | = | -37 | * | (66 | / | 221) | = | -11.04977372 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Trapp Elementary | -14 | ||||||||||||
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 | 64354 | 2439 | - | 2436 | = | 3 | * | (67 | / | 221) | = | 0.90950226 | ||
| 4 | 64355 | 2479 | - | 2485 | = | -6 | * | (82 | / | 221) | = | -2.22624434 | ||
| 5 | 64358 | 2518 | - | 2528 | = | -10 | * | (72 | / | 221) | = | -3.25791855 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Trapp Elementary | -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 |
||
| 3 | 64721 | 2441 | - | 2436 | = | 5 | * | (65 | / | 219) | = | 1.48401826 | ||
| 4 | 64722 | 2488 | - | 2485 | = | 3 | * | (74 | / | 219) | = | 1.01369863 | ||
| 5 | 64723 | 2523 | - | 2528 | = | -5 | * | (80 | / | 219) | = | -1.82648402 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Trapp Elementary | 1 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -49 | -28 | -14 | -5 | 1 | -95.0 | -19.0 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 41.0
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -79.0
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 | 74% | 78% | 79% | 77% | 78% |
| 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.
Trapp Elementary math proficiency
Zero+ meets standard.
62% less $meal
69% less $meal
64% less $meal
68% less $meal
68% 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.