Cortada Elementary (Data source)
Source data for Cortada 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 | 689879 | 2365 | - | 2436 | = | -71 | * | (57 | / | 246) | = | -16.45121951 | ||
| 4 | 689882 | 2416 | - | 2485 | = | -69 | * | (67 | / | 246) | = | -18.79268289 | ||
| 5 | 689883 | 2442 | - | 2528 | = | -86 | * | (58 | / | 246) | = | -20.2764227 | ||
| 6 | 689886 | 2481 | - | 2552 | = | -71 | * | (64 | / | 246) | = | -18.47154467 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Cortada Elementary | -74 | ||||||||||||
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 | 21809 | 2370 | - | 2436 | = | -66 | * | (66 | / | 244) | = | -17.852459 | ||
| 4 | 21811 | 2402 | - | 2485 | = | -83 | * | (59 | / | 244) | = | -20.06967207 | ||
| 5 | 21813 | 2454 | - | 2528 | = | -74 | * | (64 | / | 244) | = | -19.40983599 | ||
| 6 | 21814 | 2498 | - | 2552 | = | -54 | * | (55 | / | 244) | = | -12.17213114 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Cortada Elementary | -70 | ||||||||||||
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 | 22225 | 2406 | - | 2436 | = | -30 | * | (62 | / | 238) | = | -7.81512603 | ||
| 4 | 22228 | 2411 | - | 2485 | = | -74 | * | (60 | / | 238) | = | -18.65546216 | ||
| 5 | 22230 | 2438 | - | 2528 | = | -90 | * | (56 | / | 238) | = | -21.17647053 | ||
| 6 | 22231 | 2473 | - | 2552 | = | -79 | * | (60 | / | 238) | = | -19.91596636 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Cortada Elementary | -68 | ||||||||||||
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 | 22212 | 2406 | - | 2436 | = | -30 | * | (47 | / | 223) | = | -6.32286993 | ||
| 4 | 22215 | 2448 | - | 2485 | = | -37 | * | (59 | / | 223) | = | -9.78923767 | ||
| 5 | 22216 | 2452 | - | 2528 | = | -76 | * | (58 | / | 223) | = | -19.76681614 | ||
| 6 | 22219 | 2465 | - | 2552 | = | -87 | * | (59 | / | 223) | = | -23.01793722 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Cortada Elementary | -59 | ||||||||||||
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 | 22391 | 2418 | - | 2436 | = | -18 | * | (51 | / | 217) | = | -4.23041474 | ||
| 4 | 22392 | 2427 | - | 2485 | = | -58 | * | (49 | / | 217) | = | -13.09677416 | ||
| 5 | 22393 | 2479 | - | 2528 | = | -49 | * | (60 | / | 217) | = | -13.54838706 | ||
| 6 | 22394 | 2476 | - | 2552 | = | -76 | * | (57 | / | 217) | = | -19.96313364 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Cortada Elementary | -51 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -74 | -70 | -68 | -59 | -51 | -322.0 | -64.4 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -37.4
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -91.4
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 | 96% | 98% | 96% | 97% | 97% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
El Monte City 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.
Cortada Elementary math proficiency
Zero+ meets standard.
88% less $meal
90% less $meal
87% less $meal
90% less $meal
90% 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.