Shaffer Elementary (Data source)
Source data for Shaffer 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 | 591743 | 2389 | - | 2436 | = | -47 | * | (24 | / | 133) | = | -8.48120297 | ||
| 4 | 591744 | 2454 | - | 2485 | = | -31 | * | (21 | / | 133) | = | -4.89473682 | ||
| 5 | 591747 | 2494 | - | 2528 | = | -34 | * | (23 | / | 133) | = | -5.87969922 | ||
| 6 | 591748 | 2468 | - | 2552 | = | -84 | * | (16 | / | 133) | = | -10.10526308 | ||
| 7 | 591751 | 2516 | - | 2567 | = | -51 | * | (25 | / | 133) | = | -9.58646612 | ||
| 8 | 591752 | 2550 | - | 2586 | = | -36 | * | (24 | / | 133) | = | -6.49624057 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Shaffer Elementary | -45 | ||||||||||||
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 | 18928 | 2399 | - | 2436 | = | -37 | * | (20 | / | 126) | = | -5.87301585 | ||
| 4 | 18930 | 2464 | - | 2485 | = | -21 | * | (27 | / | 126) | = | -4.49999999 | ||
| 5 | 18933 | 2458 | - | 2528 | = | -70 | * | (20 | / | 126) | = | -11.11111106 | ||
| 6 | 18935 | 2518 | - | 2552 | = | -34 | * | (22 | / | 126) | = | -5.93650792 | ||
| 7 | 18936 | 2525 | - | 2567 | = | -42 | * | (12 | / | 126) | = | -3.99999999 | ||
| 8 | 18939 | 2544 | - | 2586 | = | -42 | * | (25 | / | 126) | = | -8.33333332 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Shaffer Elementary | -40 | ||||||||||||
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 | 19260 | 2383 | - | 2436 | = | -53 | * | (19 | / | 116) | = | -8.68103446 | ||
| 4 | 19262 | 2463 | - | 2485 | = | -22 | * | (19 | / | 116) | = | -3.60344827 | ||
| 5 | 19264 | 2450 | - | 2528 | = | -78 | * | (25 | / | 116) | = | -16.8103448 | ||
| 6 | 19266 | 2479 | - | 2552 | = | -73 | * | (22 | / | 116) | = | -13.84482756 | ||
| 7 | 19268 | 2540 | - | 2567 | = | -27 | * | (18 | / | 116) | = | -4.18965515 | ||
| 8 | 19269 | 2553 | - | 2586 | = | -33 | * | (13 | / | 116) | = | -3.69827585 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Shaffer Elementary | -51 | ||||||||||||
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 | 19262 | 2418 | - | 2436 | = | -18 | * | (21 | / | 117) | = | -3.23076922 | ||
| 4 | 19263 | 2484 | - | 2485 | = | -1 | * | (19 | / | 117) | = | -0.16239316 | ||
| 5 | 19266 | 2453 | - | 2528 | = | -75 | * | (19 | / | 117) | = | -12.17948715 | ||
| 6 | 19267 | 2514 | - | 2552 | = | -38 | * | (22 | / | 117) | = | -7.14529914 | ||
| 7 | 19270 | 2536 | - | 2567 | = | -31 | * | (20 | / | 117) | = | -5.29914527 | ||
| 8 | 19271 | 2575 | - | 2586 | = | -11 | * | (16 | / | 117) | = | -1.5042735 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Shaffer Elementary | -30 | ||||||||||||
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 | 19409 | 2385 | - | 2436 | = | -51 | * | (23 | / | 138) | = | -8.49999997 | ||
| 4 | 19410 | 2469 | - | 2485 | = | -16 | * | (23 | / | 138) | = | -2.66666666 | ||
| 5 | 19411 | 2475 | - | 2528 | = | -53 | * | (21 | / | 138) | = | -8.06521739 | ||
| 6 | 19412 | 2496 | - | 2552 | = | -56 | * | (23 | / | 138) | = | -9.3333333 | ||
| 7 | 19413 | 2561 | - | 2567 | = | -6 | * | (25 | / | 138) | = | -1.08695652 | ||
| 8 | 19414 | 2565 | - | 2586 | = | -21 | * | (23 | / | 138) | = | -3.49999999 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Shaffer Elementary | -33 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -45 | -40 | -51 | -30 | -33 | -199.0 | -39.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -15.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -63.8
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 | 68% | 66% | 73% | 74% | 74% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Shaffer Union Elementary school district | County of Lassen
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.
Shaffer Elementary math proficiency
Zero+ meets standard.
61% less $meal
52% less $meal
59% less $meal
69% less $meal
69% 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.
Elementary School in 1 School District (Public) schools in Shaffer Union Elementary (1)
| Shaffer Elementary |