Lake Elementary (Data source)
Source data for Lake 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 | 236160 | 2384 | - | 2436 | = | -52 | * | (71 | / | 238) | = | -15.512605 | ||
| 4 | 236161 | 2394 | - | 2485 | = | -91 | * | (65 | / | 238) | = | -24.85294111 | ||
| 5 | 236164 | 2411 | - | 2528 | = | -117 | * | (57 | / | 238) | = | -28.02100837 | ||
| 6 | 236165 | 2436 | - | 2552 | = | -116 | * | (45 | / | 238) | = | -21.93277308 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Lake Elementary | -90 | ||||||||||||
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 | 6924 | 2379 | - | 2436 | = | -57 | * | (62 | / | 246) | = | -14.36585364 | ||
| 4 | 6925 | 2404 | - | 2485 | = | -81 | * | (66 | / | 246) | = | -21.73170724 | ||
| 5 | 6928 | 2440 | - | 2528 | = | -88 | * | (61 | / | 246) | = | -21.82113815 | ||
| 6 | 6929 | 2438 | - | 2552 | = | -114 | * | (57 | / | 246) | = | -26.41463414 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Lake Elementary | -84 | ||||||||||||
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 | 7135 | 2360 | - | 2436 | = | -76 | * | (43 | / | 220) | = | -14.85454542 | ||
| 4 | 7137 | 2404 | - | 2485 | = | -81 | * | (61 | / | 220) | = | -22.45909089 | ||
| 5 | 7139 | 2423 | - | 2528 | = | -105 | * | (57 | / | 220) | = | -27.20454545 | ||
| 6 | 7141 | 2447 | - | 2552 | = | -105 | * | (59 | / | 220) | = | -28.15909089 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Lake Elementary | -93 | ||||||||||||
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 | 7154 | 2385 | - | 2436 | = | -51 | * | (39 | / | 198) | = | -10.0454545 | ||
| 4 | 7156 | 2432 | - | 2485 | = | -53 | * | (44 | / | 198) | = | -11.77777777 | ||
| 5 | 7158 | 2423 | - | 2528 | = | -105 | * | (57 | / | 198) | = | -30.22727264 | ||
| 6 | 7160 | 2467 | - | 2552 | = | -85 | * | (58 | / | 198) | = | -24.89898982 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Lake Elementary | -77 | ||||||||||||
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 | 7200 | 2359 | - | 2436 | = | -77 | * | (64 | / | 203) | = | -24.275862 | ||
| 4 | 7201 | 2442 | - | 2485 | = | -43 | * | (42 | / | 203) | = | -8.89655169 | ||
| 5 | 7202 | 2426 | - | 2528 | = | -102 | * | (40 | / | 203) | = | -20.09852207 | ||
| 6 | 7203 | 2463 | - | 2552 | = | -89 | * | (57 | / | 203) | = | -24.99014775 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Lake Elementary | -78 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -90 | -84 | -93 | -77 | -78 | -422.0 | -84.4 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -63.4
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -105.4
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 | 98% | 95% | 95% | 93% | 94% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
West Contra Costa Unified school district | County of Contra Costa
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.
Lake Elementary math proficiency
Zero+ meets standard.
83% less $meal
83% less $meal
82% less $meal
81% less $meal
81% 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.