Armstrong Elementary (Data source)
Source data for Armstrong 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 | 1098412 | 2428 | - | 2436 | = | -8 | * | (57 | / | 244) | = | -1.86885246 | ||
| 4 | 1098415 | 2455 | - | 2485 | = | -30 | * | (62 | / | 244) | = | -7.6229508 | ||
| 5 | 1098416 | 2482 | - | 2528 | = | -46 | * | (61 | / | 244) | = | -11.5 | ||
| 6 | 1098419 | 2535 | - | 2552 | = | -17 | * | (64 | / | 244) | = | -4.45901638 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Armstrong Elementary | -25 | ||||||||||||
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 | 34382 | 2432 | - | 2436 | = | -4 | * | (50 | / | 228) | = | -0.87719298 | ||
| 4 | 34384 | 2461 | - | 2485 | = | -24 | * | (54 | / | 228) | = | -5.68421052 | ||
| 5 | 34386 | 2484 | - | 2528 | = | -44 | * | (63 | / | 228) | = | -12.15789472 | ||
| 6 | 34388 | 2519 | - | 2552 | = | -33 | * | (61 | / | 228) | = | -8.82894735 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Armstrong 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 | 34993 | 2445 | - | 2436 | = | 9 | * | (44 | / | 213) | = | 1.85915492 | ||
| 4 | 34996 | 2448 | - | 2485 | = | -37 | * | (54 | / | 213) | = | -9.38028166 | ||
| 5 | 34998 | 2450 | - | 2528 | = | -78 | * | (55 | / | 213) | = | -20.14084504 | ||
| 6 | 35000 | 2534 | - | 2552 | = | -18 | * | (60 | / | 213) | = | -5.07042252 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Armstrong Elementary | -33 | ||||||||||||
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 | 35003 | 2435 | - | 2436 | = | -1 | * | (41 | / | 175) | = | -0.23428571 | ||
| 4 | 35005 | 2471 | - | 2485 | = | -14 | * | (41 | / | 175) | = | -3.28 | ||
| 5 | 35007 | 2490 | - | 2528 | = | -38 | * | (49 | / | 175) | = | -10.64 | ||
| 6 | 35009 | 2552 | - | 2552 | = | 0 | * | (44 | / | 175) | = | 0.0 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Armstrong Elementary | -14 | ||||||||||||
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 | 35179 | 2427 | - | 2436 | = | -9 | * | (36 | / | 164) | = | -1.97560976 | ||
| 4 | 35180 | 2459 | - | 2485 | = | -26 | * | (40 | / | 164) | = | -6.34146341 | ||
| 5 | 35181 | 2501 | - | 2528 | = | -27 | * | (42 | / | 164) | = | -6.91463412 | ||
| 6 | 35182 | 2556 | - | 2552 | = | 4 | * | (46 | / | 164) | = | 1.12195122 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Armstrong Elementary | -14 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -25 | -28 | -33 | -14 | -14 | -114.0 | -22.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 1.2
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -46.8
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 | 49% | 54% | 56% | 63% | 73% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Pomona 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.
Armstrong Elementary math proficiency
Zero+ meets standard.
38% less $meal
46% less $meal
44% less $meal
54% less $meal
54% 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.