Visitacion Valley Middle (Data source)
Source data for Visitacion Valley Middle
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 |
||
| 6 | 2376804 | 2432 | - | 2552 | = | -120 | * | (213 | / | 519) | = | -49.24855488 | ||
| 7 | 2376807 | 2451 | - | 2567 | = | -116 | * | (156 | / | 519) | = | -34.86705194 | ||
| 8 | 2376808 | 2414 | - | 2586 | = | -172 | * | (150 | / | 519) | = | -49.71098265 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Visitacion Valley Middle | -134 | ||||||||||||
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 |
||
| 6 | 72590 | 2413 | - | 2552 | = | -139 | * | (142 | / | 505) | = | -39.0851484 | ||
| 7 | 72591 | 2448 | - | 2567 | = | -119 | * | (183 | / | 505) | = | -43.1227722 | ||
| 8 | 72594 | 2442 | - | 2586 | = | -144 | * | (180 | / | 505) | = | -51.32673259 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Visitacion Valley Middle | -134 | ||||||||||||
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 |
||
| 6 | 74561 | 2408 | - | 2552 | = | -144 | * | (72 | / | 409) | = | -25.34963314 | ||
| 7 | 74564 | 2416 | - | 2567 | = | -151 | * | (147 | / | 409) | = | -54.2713935 | ||
| 8 | 74565 | 2441 | - | 2586 | = | -145 | * | (190 | / | 409) | = | -67.35941317 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Visitacion Valley Middle | -147 | ||||||||||||
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 |
||
| 6 | 74736 | 2421 | - | 2552 | = | -131 | * | (122 | / | 354) | = | -45.14689261 | ||
| 7 | 74737 | 2433 | - | 2567 | = | -134 | * | (90 | / | 354) | = | -34.06779659 | ||
| 8 | 74740 | 2415 | - | 2586 | = | -171 | * | (142 | / | 354) | = | -68.59322025 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Visitacion Valley Middle | -148 | ||||||||||||
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 |
||
| 6 | 75261 | 2407 | - | 2552 | = | -145 | * | (136 | / | 366) | = | -53.87978136 | ||
| 7 | 75262 | 2441 | - | 2567 | = | -126 | * | (127 | / | 366) | = | -43.72131141 | ||
| 8 | 75263 | 2431 | - | 2586 | = | -155 | * | (103 | / | 366) | = | -43.62021858 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Visitacion Valley Middle | -141 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -134 | -134 | -147 | -148 | -141 | -704.0 | -140.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -122.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -158.8
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 | 83% | 74% | 67% | 78% | 73% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
San Francisco Unified school district | County of San Francisco
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.
Visitacion Valley Middle math proficiency
Zero+ meets standard.
74% less $meal
69% less $meal
62% less $meal
69% less $meal
64% 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.