Northwood Elementary (Data source)
Source data for Northwood 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 | 1386244 | 2454 | - | 2436 | = | 18 | * | (58 | / | 184) | = | 5.67391304 | ||
| 4 | 1386245 | 2489 | - | 2485 | = | 4 | * | (63 | / | 184) | = | 1.36956522 | ||
| 5 | 1386248 | 2526 | - | 2528 | = | -2 | * | (63 | / | 184) | = | -0.68478261 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Northwood Elementary | 6 | ||||||||||||
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 | 43666 | 2469 | - | 2436 | = | 33 | * | (52 | / | 170) | = | 10.09411762 | ||
| 4 | 43668 | 2528 | - | 2485 | = | 43 | * | (61 | / | 170) | = | 15.42941175 | ||
| 5 | 43670 | 2507 | - | 2528 | = | -21 | * | (57 | / | 170) | = | -7.04117646 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Northwood Elementary | 18 | ||||||||||||
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 | 44741 | 2470 | - | 2436 | = | 34 | * | (51 | / | 178) | = | 9.741573 | ||
| 4 | 44743 | 2503 | - | 2485 | = | 18 | * | (61 | / | 178) | = | 6.16853932 | ||
| 5 | 44746 | 2513 | - | 2528 | = | -15 | * | (66 | / | 178) | = | -5.56179774 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Northwood Elementary | 10 | ||||||||||||
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 | 44755 | 2471 | - | 2436 | = | 35 | * | (70 | / | 190) | = | 12.89473682 | ||
| 4 | 44756 | 2490 | - | 2485 | = | 5 | * | (59 | / | 190) | = | 1.55263158 | ||
| 5 | 44759 | 2503 | - | 2528 | = | -25 | * | (61 | / | 190) | = | -8.02631578 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Northwood Elementary | 6 | ||||||||||||
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 | 44889 | 2474 | - | 2436 | = | 38 | * | (58 | / | 196) | = | 11.24489795 | ||
| 4 | 44890 | 2516 | - | 2485 | = | 31 | * | (75 | / | 196) | = | 11.86224489 | ||
| 5 | 44891 | 2525 | - | 2528 | = | -3 | * | (63 | / | 196) | = | -0.96428571 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Northwood Elementary | 22 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 6 | 18 | 10 | 6 | 22 | 62.0 | 12.4 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 33.4
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -8.6
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 | 41% | 46% | 42% | 42% | 40% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Napa Valley Unified school district | County of Napa
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.
Northwood Elementary math proficiency
Zero+ meets standard.
30% less $meal
32% less $meal
29% less $meal
36% less $meal
35% 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.