Webster Elementary (Data source)
Source data for Webster 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 | 1084827 | 2417 | - | 2436 | = | -19 | * | (76 | / | 235) | = | -6.14468085 | ||
| 4 | 1084828 | 2444 | - | 2485 | = | -41 | * | (77 | / | 235) | = | -13.43404253 | ||
| 5 | 1084831 | 2477 | - | 2528 | = | -51 | * | (82 | / | 235) | = | -17.79574467 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Webster Elementary | -37 | ||||||||||||
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 | 34000 | 2435 | - | 2436 | = | -1 | * | (78 | / | 221) | = | -0.35294118 | ||
| 4 | 34001 | 2465 | - | 2485 | = | -20 | * | (72 | / | 221) | = | -6.5158371 | ||
| 5 | 34004 | 2484 | - | 2528 | = | -44 | * | (71 | / | 221) | = | -14.13574659 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Webster Elementary | -21 | ||||||||||||
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 | 34596 | 2437 | - | 2436 | = | 1 | * | (70 | / | 222) | = | 0.31531532 | ||
| 4 | 34598 | 2468 | - | 2485 | = | -17 | * | (82 | / | 222) | = | -6.27927927 | ||
| 5 | 34599 | 2497 | - | 2528 | = | -31 | * | (70 | / | 222) | = | -9.77477477 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Webster Elementary | -16 | ||||||||||||
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 | 34599 | 2456 | - | 2436 | = | 20 | * | (50 | / | 188) | = | 5.31914892 | ||
| 4 | 34601 | 2484 | - | 2485 | = | -1 | * | (68 | / | 188) | = | -0.36170213 | ||
| 5 | 34603 | 2492 | - | 2528 | = | -36 | * | (70 | / | 188) | = | -13.4042553 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Webster Elementary | -8 | ||||||||||||
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 | 34770 | 2446 | - | 2436 | = | 10 | * | (68 | / | 182) | = | 3.73626373 | ||
| 4 | 34771 | 2498 | - | 2485 | = | 13 | * | (52 | / | 182) | = | 3.71428571 | ||
| 5 | 34772 | 2475 | - | 2528 | = | -53 | * | (62 | / | 182) | = | -18.05494502 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Webster Elementary | -11 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -37 | -21 | -16 | -8 | -11 | -93.0 | -18.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 14.4
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -51.6
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 | 65% | 61% | 58% | 65% | 66% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Pasadena Unified 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.
Webster Elementary math proficiency
Zero+ meets standard.
51% less $meal
50% less $meal
44% less $meal
52% less $meal
48% 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.