Strobridge Elementary (Data source)
Source data for Strobridge 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 | 52152 | 2375 | - | 2436 | = | -61 | * | (107 | / | 345) | = | -18.91884055 | ||
| 4 | 52153 | 2422 | - | 2485 | = | -63 | * | (75 | / | 345) | = | -13.69565215 | ||
| 5 | 52156 | 2416 | - | 2528 | = | -112 | * | (86 | / | 345) | = | -27.91884054 | ||
| 6 | 52157 | 2447 | - | 2552 | = | -105 | * | (77 | / | 345) | = | -23.43478253 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Strobridge Elementary | -84 | ||||||||||||
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 | 1389 | 2378 | - | 2436 | = | -58 | * | (66 | / | 336) | = | -11.39285712 | ||
| 4 | 1392 | 2413 | - | 2485 | = | -72 | * | (106 | / | 336) | = | -22.71428568 | ||
| 5 | 1394 | 2438 | - | 2528 | = | -90 | * | (80 | / | 336) | = | -21.42857142 | ||
| 6 | 1395 | 2442 | - | 2552 | = | -110 | * | (84 | / | 336) | = | -27.5 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Strobridge Elementary | -83 | ||||||||||||
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 | 1428 | 2378 | - | 2436 | = | -58 | * | (89 | / | 318) | = | -16.23270435 | ||
| 4 | 1429 | 2429 | - | 2485 | = | -56 | * | (62 | / | 318) | = | -10.91823897 | ||
| 5 | 1432 | 2428 | - | 2528 | = | -100 | * | (94 | / | 318) | = | -29.5597484 | ||
| 6 | 1433 | 2456 | - | 2552 | = | -96 | * | (73 | / | 318) | = | -22.03773581 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Strobridge Elementary | -79 | ||||||||||||
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 | 1457 | 2386 | - | 2436 | = | -50 | * | (70 | / | 312) | = | -11.2179487 | ||
| 4 | 1459 | 2406 | - | 2485 | = | -79 | * | (83 | / | 312) | = | -21.01602564 | ||
| 5 | 1461 | 2431 | - | 2528 | = | -97 | * | (64 | / | 312) | = | -19.89743589 | ||
| 6 | 1463 | 2458 | - | 2552 | = | -94 | * | (95 | / | 312) | = | -28.62179483 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Strobridge Elementary | -81 | ||||||||||||
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 | 1484 | 2383 | - | 2436 | = | -53 | * | (72 | / | 281) | = | -13.58007117 | ||
| 4 | 1485 | 2399 | - | 2485 | = | -86 | * | (63 | / | 281) | = | -19.28113877 | ||
| 5 | 1486 | 2405 | - | 2528 | = | -123 | * | (79 | / | 281) | = | -34.58007117 | ||
| 6 | 1487 | 2447 | - | 2552 | = | -105 | * | (67 | / | 281) | = | -25.03558712 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Strobridge Elementary | -92 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -84 | -83 | -79 | -81 | -92 | -419.0 | -83.8 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -71.8
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -95.8
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 | 78% | 82% | 74% | 64% | 71% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Hayward 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.
Strobridge Elementary math proficiency
Zero+ meets standard.
69% less $meal
72% less $meal
65% less $meal
58% less $meal
66% 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.