Branch Elementary (Data source)
Source data for Branch 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 | 2485642 | 2467 | - | 2436 | = | 31 | * | (43 | / | 184) | = | 7.24456521 | ||
| 4 | 2485643 | 2480 | - | 2485 | = | -5 | * | (43 | / | 184) | = | -1.16847826 | ||
| 5 | 2485646 | 2535 | - | 2528 | = | 7 | * | (38 | / | 184) | = | 1.44565217 | ||
| 6 | 2485647 | 2540 | - | 2552 | = | -12 | * | (60 | / | 184) | = | -3.91304347 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Branch Elementary | 4 | ||||||||||||
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 | 75779 | 2449 | - | 2436 | = | 13 | * | (53 | / | 188) | = | 3.66489361 | ||
| 4 | 75782 | 2511 | - | 2485 | = | 26 | * | (41 | / | 188) | = | 5.67021276 | ||
| 5 | 75784 | 2498 | - | 2528 | = | -30 | * | (45 | / | 188) | = | -7.18085106 | ||
| 6 | 75786 | 2560 | - | 2552 | = | 8 | * | (49 | / | 188) | = | 2.08510638 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Branch Elementary | 4 | ||||||||||||
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 | 77813 | 2443 | - | 2436 | = | 7 | * | (56 | / | 185) | = | 2.11891891 | ||
| 4 | 77815 | 2501 | - | 2485 | = | 16 | * | (51 | / | 185) | = | 4.4108108 | ||
| 5 | 77816 | 2526 | - | 2528 | = | -2 | * | (37 | / | 185) | = | -0.4 | ||
| 6 | 77818 | 2527 | - | 2552 | = | -25 | * | (41 | / | 185) | = | -5.54054053 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Branch Elementary | 1 | ||||||||||||
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 | 77974 | 2445 | - | 2436 | = | 9 | * | (51 | / | 191) | = | 2.40314135 | ||
| 4 | 77975 | 2501 | - | 2485 | = | 16 | * | (57 | / | 191) | = | 4.7748691 | ||
| 5 | 77977 | 2538 | - | 2528 | = | 10 | * | (47 | / | 191) | = | 2.46073298 | ||
| 6 | 77979 | 2588 | - | 2552 | = | 36 | * | (36 | / | 191) | = | 6.7853403 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Branch Elementary | 16 | ||||||||||||
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 | 78506 | 2438 | - | 2436 | = | 2 | * | (41 | / | 195) | = | 0.42051282 | ||
| 4 | 78507 | 2494 | - | 2485 | = | 9 | * | (52 | / | 195) | = | 2.39999999 | ||
| 5 | 78508 | 2517 | - | 2528 | = | -11 | * | (55 | / | 195) | = | -3.1025641 | ||
| 6 | 78509 | 2563 | - | 2552 | = | 11 | * | (47 | / | 195) | = | 2.65128205 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Branch Elementary | 2 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| 4 | 4 | 1 | 16 | 2 | 27.0 | 5.4 |
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: -12.6
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 | 21% | 21% | 19% | 23% | 26% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Lucia Mar Unified school district | County of San Luis Obispo
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.
Branch Elementary math proficiency
Zero+ meets standard.
16% less $meal
15% less $meal
14% less $meal
21% less $meal
21% 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.