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 | 2545354 | 2466 | - | 2436 | = | 30 | * | (60 | / | 175) | = | 10.28571426 | ||
| 4 | 2545355 | 2511 | - | 2485 | = | 26 | * | (60 | / | 175) | = | 8.91428569 | ||
| 5 | 2545358 | 2528 | - | 2528 | = | 0 | * | (55 | / | 175) | = | 0.0 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Portola Elementary | 19 | ||||||||||||
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 | 77596 | 2475 | - | 2436 | = | 39 | * | (56 | / | 173) | = | 12.62427742 | ||
| 4 | 77597 | 2518 | - | 2485 | = | 33 | * | (57 | / | 173) | = | 10.87283234 | ||
| 5 | 77600 | 2516 | - | 2528 | = | -12 | * | (60 | / | 173) | = | -4.16184971 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Portola Elementary | 19 | ||||||||||||
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 | 79739 | 2468 | - | 2436 | = | 32 | * | (53 | / | 166) | = | 10.21686746 | ||
| 4 | 79741 | 2513 | - | 2485 | = | 28 | * | (59 | / | 166) | = | 9.95180721 | ||
| 5 | 79743 | 2522 | - | 2528 | = | -6 | * | (54 | / | 166) | = | -1.95180722 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Portola Elementary | 18 | ||||||||||||
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 | 79878 | 2486 | - | 2436 | = | 50 | * | (54 | / | 163) | = | 16.56441715 | ||
| 4 | 79880 | 2512 | - | 2485 | = | 27 | * | (53 | / | 163) | = | 8.7791411 | ||
| 5 | 79882 | 2523 | - | 2528 | = | -5 | * | (56 | / | 163) | = | -1.71779141 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Portola Elementary | 24 | ||||||||||||
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 | 80379 | 2487 | - | 2436 | = | 51 | * | (54 | / | 161) | = | 17.10559003 | ||
| 4 | 80380 | 2519 | - | 2485 | = | 34 | * | (56 | / | 161) | = | 11.82608692 | ||
| 5 | 80381 | 2510 | - | 2528 | = | -18 | * | (51 | / | 161) | = | -5.70186335 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Portola Elementary | 23 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 19 | 19 | 18 | 24 | 23 | 103.0 | 20.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 26.6
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: 14.6
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 | 15% | 13% | 12% | 13% | 13% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
San Bruno Park Elementary school district | County of San Mateo
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.
10% less $meal
10% less $meal
8% less $meal
12% less $meal
11% 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.
Elementary School (Public) schools in San Bruno Park Elementary (5)
| Allen (Decima M.) Elementary | Belle Air Elementary | John Muir Elementary |
| Portola Elementary | Rollingwood Elementary |