Walter L. Bachrodt Elementary (Data source)
Source data for Walter L. Bachrodt 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 | 2712481 | 2380 | - | 2436 | = | -56 | * | (109 | / | 336) | = | -18.16666662 | ||
| 4 | 2712484 | 2438 | - | 2485 | = | -47 | * | (120 | / | 336) | = | -16.78571428 | ||
| 5 | 2712485 | 2448 | - | 2528 | = | -80 | * | (107 | / | 336) | = | -25.4761904 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Walter L. Bachrodt Elementary | -60 | ||||||||||||
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 | 82587 | 2395 | - | 2436 | = | -41 | * | (109 | / | 347) | = | -12.87896252 | ||
| 4 | 82588 | 2432 | - | 2485 | = | -53 | * | (125 | / | 347) | = | -19.09221899 | ||
| 5 | 82591 | 2455 | - | 2528 | = | -73 | * | (113 | / | 347) | = | -23.77233422 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Walter L. Bachrodt Elementary | -56 | ||||||||||||
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 | 84878 | 2391 | - | 2436 | = | -45 | * | (114 | / | 326) | = | -15.7361963 | ||
| 4 | 84880 | 2438 | - | 2485 | = | -47 | * | (96 | / | 326) | = | -13.84049077 | ||
| 5 | 84882 | 2447 | - | 2528 | = | -81 | * | (116 | / | 326) | = | -28.82208582 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Walter L. Bachrodt Elementary | -58 | ||||||||||||
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 | 85094 | 2397 | - | 2436 | = | -39 | * | (107 | / | 309) | = | -13.50485436 | ||
| 4 | 85097 | 2435 | - | 2485 | = | -50 | * | (111 | / | 309) | = | -17.961165 | ||
| 5 | 85098 | 2465 | - | 2528 | = | -63 | * | (91 | / | 309) | = | -18.553398 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Walter L. Bachrodt Elementary | -50 | ||||||||||||
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 | 85688 | 2406 | - | 2436 | = | -30 | * | (110 | / | 313) | = | -10.54313097 | ||
| 4 | 85689 | 2440 | - | 2485 | = | -45 | * | (98 | / | 313) | = | -14.08945685 | ||
| 5 | 85690 | 2458 | - | 2528 | = | -70 | * | (105 | / | 313) | = | -23.48242806 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Walter L. Bachrodt Elementary | -48 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -60 | -56 | -58 | -50 | -48 | -272.0 | -54.4 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -39.4
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -69.4
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 | 61% | 62% | 64% | 62% | 56% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
San Jose Unified school district | County of Santa Clara
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.
Walter L. Bachrodt Elementary math proficiency
Zero+ meets standard.
55% less $meal
55% less $meal
52% less $meal
54% less $meal
49% 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.