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 | 1580996 | 2487 | - | 2436 | = | 51 | * | (133 | / | 459) | = | 14.77777775 | ||
| 4 | 1580997 | 2521 | - | 2485 | = | 36 | * | (98 | / | 459) | = | 7.6862745 | ||
| 5 | 1581000 | 2546 | - | 2528 | = | 18 | * | (108 | / | 459) | = | 4.23529411 | ||
| 6 | 1581001 | 2600 | - | 2552 | = | 48 | * | (120 | / | 459) | = | 12.54901958 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Northwood Elementary | 39 | ||||||||||||
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 | 49473 | 2464 | - | 2436 | = | 28 | * | (102 | / | 454) | = | 6.29074888 | ||
| 4 | 49474 | 2530 | - | 2485 | = | 45 | * | (129 | / | 454) | = | 12.78634361 | ||
| 5 | 49476 | 2555 | - | 2528 | = | 27 | * | (110 | / | 454) | = | 6.5418502 | ||
| 6 | 49479 | 2591 | - | 2552 | = | 39 | * | (113 | / | 454) | = | 9.70704844 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Northwood Elementary | 35 | ||||||||||||
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 | 50836 | 2479 | - | 2436 | = | 43 | * | (107 | / | 449) | = | 10.24721601 | ||
| 4 | 50839 | 2505 | - | 2485 | = | 20 | * | (97 | / | 449) | = | 4.32071268 | ||
| 5 | 50840 | 2561 | - | 2528 | = | 33 | * | (127 | / | 449) | = | 9.33407571 | ||
| 6 | 50843 | 2598 | - | 2552 | = | 46 | * | (118 | / | 449) | = | 12.08908686 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Northwood Elementary | 36 | ||||||||||||
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 | 50873 | 2483 | - | 2436 | = | 47 | * | (99 | / | 408) | = | 11.40441173 | ||
| 4 | 50874 | 2513 | - | 2485 | = | 28 | * | (93 | / | 408) | = | 6.38235293 | ||
| 5 | 50877 | 2515 | - | 2528 | = | -13 | * | (93 | / | 408) | = | -2.96323529 | ||
| 6 | 50878 | 2595 | - | 2552 | = | 43 | * | (123 | / | 408) | = | 12.96323528 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Northwood Elementary | 28 | ||||||||||||
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 | 51080 | 2484 | - | 2436 | = | 48 | * | (89 | / | 353) | = | 12.10198296 | ||
| 4 | 51081 | 2502 | - | 2485 | = | 17 | * | (88 | / | 353) | = | 4.23796033 | ||
| 5 | 51082 | 2539 | - | 2528 | = | 11 | * | (87 | / | 353) | = | 2.71104815 | ||
| 6 | 51083 | 2587 | - | 2552 | = | 35 | * | (89 | / | 353) | = | 8.82436258 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Northwood Elementary | 28 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 39 | 35 | 36 | 28 | 28 | 166.0 | 33.2 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 45.2
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: 21.2
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 | 23% | 22% | 20% | 25% | 29% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Irvine 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.
Northwood Elementary math proficiency
Zero+ meets standard.
20% less $meal
19% less $meal
16% less $meal
23% less $meal
26% 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.