Arlington Elementary (Data source)
Source data for Arlington 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 | 1128546 | 2460 | - | 2436 | = | 24 | * | (100 | / | 303) | = | 7.92079207 | ||
| 4 | 1128547 | 2507 | - | 2485 | = | 22 | * | (91 | / | 303) | = | 6.60726073 | ||
| 5 | 1128550 | 2555 | - | 2528 | = | 27 | * | (112 | / | 303) | = | 9.980198 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Arlington Elementary | 25 | ||||||||||||
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 | 35203 | 2463 | - | 2436 | = | 27 | * | (105 | / | 299) | = | 9.48160534 | ||
| 4 | 35206 | 2506 | - | 2485 | = | 21 | * | (102 | / | 299) | = | 7.16387958 | ||
| 5 | 35208 | 2541 | - | 2528 | = | 13 | * | (92 | / | 299) | = | 3.99999999 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Arlington Elementary | 21 | ||||||||||||
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 | 35902 | 2455 | - | 2436 | = | 19 | * | (101 | / | 307) | = | 6.25081433 | ||
| 4 | 35903 | 2532 | - | 2485 | = | 47 | * | (102 | / | 307) | = | 15.61563518 | ||
| 5 | 35906 | 2538 | - | 2528 | = | 10 | * | (104 | / | 307) | = | 3.38762214 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Arlington Elementary | 25 | ||||||||||||
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 | 35902 | 2486 | - | 2436 | = | 50 | * | (95 | / | 299) | = | 15.8862876 | ||
| 4 | 35904 | 2533 | - | 2485 | = | 48 | * | (97 | / | 299) | = | 15.57190632 | ||
| 5 | 35905 | 2563 | - | 2528 | = | 35 | * | (107 | / | 299) | = | 12.52508359 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Arlington Elementary | 44 | ||||||||||||
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 | 36070 | 2487 | - | 2436 | = | 51 | * | (98 | / | 297) | = | 16.82828278 | ||
| 4 | 36071 | 2560 | - | 2485 | = | 75 | * | (98 | / | 297) | = | 24.74747468 | ||
| 5 | 36072 | 2571 | - | 2528 | = | 43 | * | (101 | / | 297) | = | 14.62289562 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Arlington Elementary | 56 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 25 | 21 | 25 | 44 | 56 | 171.0 | 34.2 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 79.2
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -10.8
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 | 32% | 32% | 31% | 38% | 40% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Torrance Unified school district | County of Los Angeles
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.
Arlington Elementary math proficiency
Zero+ meets standard.
24% less $meal
22% less $meal
24% less $meal
29% less $meal
32% 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.