Rancho Las Positas Elementary (Data source)
Source data for Rancho Las Positas 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 | 59859 | 2428 | - | 2436 | = | -8 | * | (86 | / | 271) | = | -2.53874538 | ||
| 4 | 59862 | 2467 | - | 2485 | = | -18 | * | (85 | / | 271) | = | -5.64575645 | ||
| 5 | 59863 | 2480 | - | 2528 | = | -48 | * | (100 | / | 271) | = | -17.71217712 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Rancho Las Positas Elementary | -26 | ||||||||||||
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 | 1588 | 2440 | - | 2436 | = | 4 | * | (102 | / | 271) | = | 1.50553505 | ||
| 4 | 1590 | 2469 | - | 2485 | = | -16 | * | (83 | / | 271) | = | -4.90036899 | ||
| 5 | 1591 | 2489 | - | 2528 | = | -39 | * | (86 | / | 271) | = | -12.37638375 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Rancho Las Positas Elementary | -16 | ||||||||||||
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 | 1635 | 2442 | - | 2436 | = | 6 | * | (135 | / | 412) | = | 1.96601941 | ||
| 4 | 1638 | 2488 | - | 2485 | = | 3 | * | (130 | / | 412) | = | 0.94660194 | ||
| 5 | 1640 | 2514 | - | 2528 | = | -14 | * | (147 | / | 412) | = | -4.99514562 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Rancho Las Positas Elementary | -2 | ||||||||||||
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 | 1652 | 2429 | - | 2436 | = | -7 | * | (80 | / | 275) | = | -2.03636363 | ||
| 4 | 1653 | 2472 | - | 2485 | = | -13 | * | (93 | / | 275) | = | -4.39636363 | ||
| 5 | 1656 | 2524 | - | 2528 | = | -4 | * | (102 | / | 275) | = | -1.48363636 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Rancho Las Positas Elementary | -8 | ||||||||||||
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 | 1677 | 2468 | - | 2436 | = | 32 | * | (95 | / | 261) | = | 11.64750957 | ||
| 4 | 1678 | 2487 | - | 2485 | = | 2 | * | (82 | / | 261) | = | 0.62835249 | ||
| 5 | 1679 | 2502 | - | 2528 | = | -26 | * | (84 | / | 261) | = | -8.36781608 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Rancho Las Positas Elementary | 4 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -26 | -16 | -2 | -8 | 4 | -48.0 | -9.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: 23.4
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -42.6
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 | 24% | 21% | 21% | 23% | 24% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Livermore Valley Joint Unified school district | County of Alameda
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.
Rancho Las Positas Elementary math proficiency
Zero+ meets standard.
18% less $meal
18% less $meal
17% less $meal
21% less $meal
22% 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.