Rio Vista Elementary (Data source)
Source data for Rio Vista 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 | 697384 | 2418 | - | 2436 | = | -18 | * | (67 | / | 219) | = | -5.50684931 | ||
| 4 | 697385 | 2434 | - | 2485 | = | -51 | * | (80 | / | 219) | = | -18.63013695 | ||
| 5 | 697388 | 2495 | - | 2528 | = | -33 | * | (72 | / | 219) | = | -10.84931506 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Rio Vista Elementary | -35 | ||||||||||||
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 | 22045 | 2428 | - | 2436 | = | -8 | * | (68 | / | 210) | = | -2.59047618 | ||
| 4 | 22046 | 2438 | - | 2485 | = | -47 | * | (65 | / | 210) | = | -14.54761902 | ||
| 5 | 22049 | 2475 | - | 2528 | = | -53 | * | (77 | / | 210) | = | -19.4333333 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Rio Vista Elementary | -37 | ||||||||||||
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 | 22466 | 2443 | - | 2436 | = | 7 | * | (64 | / | 196) | = | 2.28571428 | ||
| 4 | 22467 | 2457 | - | 2485 | = | -28 | * | (68 | / | 196) | = | -9.7142857 | ||
| 5 | 22469 | 2454 | - | 2528 | = | -74 | * | (64 | / | 196) | = | -24.16326529 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Rio Vista Elementary | -32 | ||||||||||||
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 | 22454 | 2462 | - | 2436 | = | 26 | * | (82 | / | 218) | = | 9.77981649 | ||
| 4 | 22456 | 2445 | - | 2485 | = | -40 | * | (67 | / | 218) | = | -12.29357796 | ||
| 5 | 22458 | 2469 | - | 2528 | = | -59 | * | (69 | / | 218) | = | -18.6743119 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Rio Vista Elementary | -21 | ||||||||||||
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 | 22638 | 2429 | - | 2436 | = | -7 | * | (69 | / | 219) | = | -2.20547945 | ||
| 4 | 22639 | 2486 | - | 2485 | = | 1 | * | (78 | / | 219) | = | 0.35616438 | ||
| 5 | 22640 | 2464 | - | 2528 | = | -64 | * | (72 | / | 219) | = | -21.04109587 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Rio Vista Elementary | -23 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -35 | -37 | -32 | -21 | -23 | -148.0 | -29.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -8.6
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -50.6
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 | 87% | 78% | 78% | 71% | 70% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
El Rancho 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.
Rio Vista Elementary math proficiency
Zero+ meets standard.
67% less $meal
67% less $meal
62% less $meal
60% less $meal
58% 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.