Portola Elementary (Data source)
Source data for Portola 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 | 3150968 | 2453 | - | 2436 | = | 17 | * | (115 | / | 340) | = | 5.75 | ||
| 4 | 3150969 | 2486 | - | 2485 | = | 1 | * | (137 | / | 340) | = | 0.40294118 | ||
| 5 | 3150972 | 2546 | - | 2528 | = | 18 | * | (88 | / | 340) | = | 4.65882352 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Portola Elementary | 11 | ||||||||||||
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 | 97117 | 2451 | - | 2436 | = | 15 | * | (95 | / | 337) | = | 4.22848664 | ||
| 4 | 97119 | 2516 | - | 2485 | = | 31 | * | (111 | / | 337) | = | 10.21068247 | ||
| 5 | 97120 | 2528 | - | 2528 | = | 0 | * | (131 | / | 337) | = | 0.0 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Portola Elementary | 14 | ||||||||||||
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 | 99927 | 2457 | - | 2436 | = | 21 | * | (76 | / | 289) | = | 5.52249134 | ||
| 4 | 99929 | 2528 | - | 2485 | = | 43 | * | (99 | / | 289) | = | 14.73010378 | ||
| 5 | 99932 | 2536 | - | 2528 | = | 8 | * | (114 | / | 289) | = | 3.15570934 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Portola Elementary | 23 | ||||||||||||
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 | 100078 | 2472 | - | 2436 | = | 36 | * | (103 | / | 275) | = | 13.48363634 | ||
| 4 | 100081 | 2524 | - | 2485 | = | 39 | * | (76 | / | 275) | = | 10.7781818 | ||
| 5 | 100082 | 2547 | - | 2528 | = | 19 | * | (96 | / | 275) | = | 6.63272727 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Portola Elementary | 31 | ||||||||||||
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 | 100743 | 2481 | - | 2436 | = | 45 | * | (96 | / | 264) | = | 16.36363634 | ||
| 4 | 100744 | 2545 | - | 2485 | = | 60 | * | (90 | / | 264) | = | 20.4545454 | ||
| 5 | 100745 | 2535 | - | 2528 | = | 7 | * | (78 | / | 264) | = | 2.06818182 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Portola Elementary | 39 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 11 | 14 | 23 | 31 | 39 | 118.0 | 23.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 56.6
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -9.4
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 | 65% | 64% | 67% | 69% | 66% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Ventura Unified school district | County of Ventura
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.
Portola Elementary math proficiency
Zero+ meets standard.
47% less $meal
48% less $meal
42% less $meal
50% less $meal
46% 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.