De Portola Elementary (Data source)
Source data for De 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 | 1558296 | 2473 | - | 2436 | = | 37 | * | (89 | / | 369) | = | 8.92411921 | ||
| 4 | 1558299 | 2519 | - | 2485 | = | 34 | * | (89 | / | 369) | = | 8.20054197 | ||
| 5 | 1558300 | 2545 | - | 2528 | = | 17 | * | (90 | / | 369) | = | 4.14634146 | ||
| 6 | 1558303 | 2581 | - | 2552 | = | 29 | * | (101 | / | 369) | = | 7.93766937 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for De Portola Elementary | 29 | ||||||||||||
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 | 48805 | 2472 | - | 2436 | = | 36 | * | (57 | / | 341) | = | 6.0175953 | ||
| 4 | 48807 | 2533 | - | 2485 | = | 48 | * | (107 | / | 341) | = | 15.06158357 | ||
| 5 | 48809 | 2554 | - | 2528 | = | 26 | * | (87 | / | 341) | = | 6.63343106 | ||
| 6 | 48811 | 2604 | - | 2552 | = | 52 | * | (90 | / | 341) | = | 13.72434014 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for De Portola Elementary | 41 | ||||||||||||
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 | 50140 | 2480 | - | 2436 | = | 44 | * | (72 | / | 324) | = | 9.77777777 | ||
| 4 | 50142 | 2510 | - | 2485 | = | 25 | * | (56 | / | 324) | = | 4.32098765 | ||
| 5 | 50145 | 2571 | - | 2528 | = | 43 | * | (105 | / | 324) | = | 13.93518518 | ||
| 6 | 50147 | 2598 | - | 2552 | = | 46 | * | (91 | / | 324) | = | 12.91975306 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for De Portola Elementary | 41 | ||||||||||||
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 | 50169 | 2477 | - | 2436 | = | 41 | * | (80 | / | 315) | = | 10.41269837 | ||
| 4 | 50170 | 2530 | - | 2485 | = | 45 | * | (76 | / | 315) | = | 10.85714285 | ||
| 5 | 50172 | 2561 | - | 2528 | = | 33 | * | (59 | / | 315) | = | 6.18095237 | ||
| 6 | 50175 | 2613 | - | 2552 | = | 61 | * | (100 | / | 315) | = | 19.36507934 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for De Portola Elementary | 47 | ||||||||||||
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 | 50362 | 2492 | - | 2436 | = | 56 | * | (62 | / | 284) | = | 12.2253521 | ||
| 4 | 50363 | 2520 | - | 2485 | = | 35 | * | (85 | / | 284) | = | 10.47535209 | ||
| 5 | 50364 | 2591 | - | 2528 | = | 63 | * | (78 | / | 284) | = | 17.30281688 | ||
| 6 | 50365 | 2602 | - | 2552 | = | 50 | * | (59 | / | 284) | = | 10.3873239 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for De Portola Elementary | 50 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 29 | 41 | 41 | 47 | 50 | 208.0 | 41.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 65.6
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: 17.6
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 | 8% | 6% | 7% | 10% | 9% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Saddleback Valley Unified school district | County of Orange
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.
De Portola Elementary math proficiency
Zero+ meets standard.
6% less $meal
6% less $meal
6% less $meal
9% less $meal
9% 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.