W. R. Nelson Elementary (Data source)
Source data for W. R. Nelson 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 | 1570517 | 2380 | - | 2436 | = | -56 | * | (115 | / | 330) | = | -19.51515149 | ||
| 4 | 1570520 | 2469 | - | 2485 | = | -16 | * | (101 | / | 330) | = | -4.8969697 | ||
| 5 | 1570521 | 2469 | - | 2528 | = | -59 | * | (114 | / | 330) | = | -20.38181816 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for W. R. Nelson Elementary | -45 | ||||||||||||
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 | 49159 | 2402 | - | 2436 | = | -34 | * | (99 | / | 313) | = | -10.75399359 | ||
| 4 | 49161 | 2443 | - | 2485 | = | -42 | * | (108 | / | 313) | = | -14.49201277 | ||
| 5 | 49163 | 2477 | - | 2528 | = | -51 | * | (106 | / | 313) | = | -17.27156545 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for W. R. Nelson Elementary | -43 | ||||||||||||
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 | 50501 | 2398 | - | 2436 | = | -38 | * | (83 | / | 285) | = | -11.06666666 | ||
| 4 | 50502 | 2463 | - | 2485 | = | -22 | * | (97 | / | 285) | = | -7.48771929 | ||
| 5 | 50504 | 2477 | - | 2528 | = | -51 | * | (105 | / | 285) | = | -18.78947365 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for W. R. Nelson Elementary | -37 | ||||||||||||
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 | 50522 | 2401 | - | 2436 | = | -35 | * | (77 | / | 258) | = | -10.44573642 | ||
| 4 | 50525 | 2453 | - | 2485 | = | -32 | * | (82 | / | 258) | = | -10.17054262 | ||
| 5 | 50526 | 2474 | - | 2528 | = | -54 | * | (99 | / | 258) | = | -20.72093022 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for W. R. Nelson Elementary | -41 | ||||||||||||
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 | 50723 | 2402 | - | 2436 | = | -34 | * | (78 | / | 235) | = | -11.28510636 | ||
| 4 | 50724 | 2449 | - | 2485 | = | -36 | * | (76 | / | 235) | = | -11.64255318 | ||
| 5 | 50725 | 2468 | - | 2528 | = | -60 | * | (81 | / | 235) | = | -20.68085106 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for W. R. Nelson Elementary | -44 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -45 | -43 | -37 | -41 | -44 | -210.0 | -42.0 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -33.0
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -51.0
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 | 60% | 62% | 63% | 73% | 68% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Tustin Unified school district | County of Orange
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.
W. R. Nelson Elementary math proficiency
Zero+ meets standard.
47% less $meal
47% less $meal
49% less $meal
63% less $meal
60% 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.