William J. Johnston Community Day (Data source)
Source data for William J. Johnston Community Day
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 |
||
| 7 | 789113 | 0 | - | 2567 | = | * | (2 | / | 28) | = | ||||
| 8 | 789114 | 0 | - | 2586 | = | * | (3 | / | 28) | = | ||||
| 11 | 789117 | 2401 | - | 2628 | = | -227 | * | (23 | / | 28) | = | -186.46428562 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for William J. Johnston Community Day | -186 | ||||||||||||
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 |
||
| 7 | 24637 | 0 | - | 2567 | = | * | (3 | / | 33) | = | ||||
| 8 | 24639 | 2411 | - | 2586 | = | -175 | * | (13 | / | 33) | = | -68.93939378 | ||
| 11 | 24640 | 2443 | - | 2628 | = | -185 | * | (17 | / | 33) | = | -95.30303028 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for William J. Johnston Community Day | -164 | ||||||||||||
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 |
||
| 7 | 25131 | 0 | - | 2567 | = | * | (0 | / | 16) | = | ||||
| 8 | 25134 | 0 | - | 2586 | = | * | (0 | / | 16) | = | ||||
| 11 | 25135 | 0 | - | 2628 | = | * | (0 | / | 16) | = | ||||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for William J. Johnston Community Day | |||||||||||||
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 |
||
| 7 | 25155 | 0 | - | 2567 | = | * | (0 | / | 34) | = | ||||
| 8 | 25157 | 2360 | - | 2586 | = | -226 | * | (11 | / | 34) | = | -73.11764689 | ||
| 11 | 25158 | 2416 | - | 2628 | = | -212 | * | (16 | / | 34) | = | -99.76470582 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for William J. Johnston Community Day | -173 | ||||||||||||
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 |
||
| 7 | 25314 | 0 | - | 2567 | = | * | (0 | / | 38) | = | ||||
| 8 | 25315 | 0 | - | 2586 | = | * | (10 | / | 38) | = | ||||
| 11 | 25316 | 2428 | - | 2628 | = | -200 | * | (26 | / | 38) | = | -136.8421052 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for William J. Johnston Community Day | -137 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -186 | -164 | -173 | -137 | -660.0 | -132.0 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -105.0
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -225.0
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 | 79% | 92% | 97% | 93% | 97% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Los Angeles 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.
William J. Johnston Community Day math proficiency
Zero+ meets standard.
71% less $meal
83% less $meal
88% less $meal
90% 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.
District Community Day Schools schools in Los Angeles Unified (8)
| Aggeler Community Day | CDS Elementary | CDS Secondary |
| Dorothy V. Johnson Community Day | Jack London Community Day | Richard A. Alonzo Community Day |
| Tri-C Community Day | William J. Johnston Community Day |