Bancroft Elementary (Data source)
Source data for Bancroft 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 | 2181381 | 2354 | - | 2436 | = | -82 | * | (82 | / | 376) | = | -17.88297869 | ||
| 4 | 2181382 | 2411 | - | 2485 | = | -74 | * | (96 | / | 376) | = | -18.89361695 | ||
| 5 | 2181384 | 2449 | - | 2528 | = | -79 | * | (94 | / | 376) | = | -19.75 | ||
| 6 | 2181386 | 2468 | - | 2552 | = | -84 | * | (104 | / | 376) | = | -23.2340425 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Bancroft Elementary | -80 | ||||||||||||
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 | 67011 | 2341 | - | 2436 | = | -95 | * | (89 | / | 353) | = | -23.95184128 | ||
| 4 | 67014 | 2398 | - | 2485 | = | -87 | * | (91 | / | 353) | = | -22.42776202 | ||
| 5 | 67016 | 2423 | - | 2528 | = | -105 | * | (87 | / | 353) | = | -25.87818692 | ||
| 6 | 67017 | 2459 | - | 2552 | = | -93 | * | (86 | / | 353) | = | -22.65722377 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Bancroft Elementary | -95 | ||||||||||||
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 | 68838 | 2362 | - | 2436 | = | -74 | * | (99 | / | 321) | = | -22.82242984 | ||
| 4 | 68841 | 2398 | - | 2485 | = | -87 | * | (79 | / | 321) | = | -21.41121495 | ||
| 5 | 68842 | 2410 | - | 2528 | = | -118 | * | (74 | / | 321) | = | -27.20249221 | ||
| 6 | 68844 | 2426 | - | 2552 | = | -126 | * | (69 | / | 321) | = | -27.08411215 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Bancroft Elementary | -99 | ||||||||||||
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 | 69009 | 2381 | - | 2436 | = | -55 | * | (75 | / | 285) | = | -14.47368417 | ||
| 4 | 69011 | 2417 | - | 2485 | = | -68 | * | (82 | / | 285) | = | -19.56491226 | ||
| 5 | 69013 | 2413 | - | 2528 | = | -115 | * | (66 | / | 285) | = | -26.63157891 | ||
| 6 | 69015 | 2436 | - | 2552 | = | -116 | * | (62 | / | 285) | = | -25.23508764 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Bancroft Elementary | -86 | ||||||||||||
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 | 69548 | 2365 | - | 2436 | = | -71 | * | (66 | / | 273) | = | -17.16483511 | ||
| 4 | 69549 | 2426 | - | 2485 | = | -59 | * | (68 | / | 273) | = | -14.69597069 | ||
| 5 | 69550 | 2411 | - | 2528 | = | -117 | * | (76 | / | 273) | = | -32.57142853 | ||
| 6 | 69551 | 2458 | - | 2552 | = | -94 | * | (63 | / | 273) | = | -21.69230762 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Bancroft Elementary | -86 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -80 | -95 | -99 | -86 | -86 | -446.0 | -89.2 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -68.2
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -110.2
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 | 91% | 93% | 89% | 91% | 92% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
La Mesa-Spring Valley school district | County of San Diego
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.
Bancroft Elementary math proficiency
Zero+ meets standard.
78% less $meal
84% less $meal
77% less $meal
78% less $meal
83% 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.