Longfellow Elementary (Data source)
Source data for Longfellow 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 | 1163644 | 2382 | - | 2436 | = | -54 | * | (69 | / | 270) | = | -13.79999997 | ||
| 4 | 1163645 | 2422 | - | 2485 | = | -63 | * | (87 | / | 270) | = | -20.29999999 | ||
| 5 | 1163648 | 2440 | - | 2528 | = | -88 | * | (66 | / | 270) | = | -21.51111107 | ||
| 6 | 1163649 | 2490 | - | 2552 | = | -62 | * | (48 | / | 270) | = | -11.02222217 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Longfellow Elementary | -67 | ||||||||||||
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 | 36219 | 2398 | - | 2436 | = | -38 | * | (78 | / | 268) | = | -11.05970149 | ||
| 4 | 36222 | 2443 | - | 2485 | = | -42 | * | (67 | / | 268) | = | -10.5 | ||
| 5 | 36224 | 2469 | - | 2528 | = | -59 | * | (80 | / | 268) | = | -17.61194026 | ||
| 6 | 36226 | 2495 | - | 2552 | = | -57 | * | (43 | / | 268) | = | -9.14552238 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Longfellow Elementary | -48 | ||||||||||||
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 | 36976 | 2372 | - | 2436 | = | -64 | * | (70 | / | 257) | = | -17.43190656 | ||
| 4 | 36978 | 2434 | - | 2485 | = | -51 | * | (69 | / | 257) | = | -13.69260699 | ||
| 5 | 36979 | 2444 | - | 2528 | = | -84 | * | (60 | / | 257) | = | -19.61089494 | ||
| 6 | 36981 | 2508 | - | 2552 | = | -44 | * | (58 | / | 257) | = | -9.92996105 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Longfellow Elementary | -61 | ||||||||||||
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 | 36942 | 2405 | - | 2436 | = | -31 | * | (73 | / | 284) | = | -7.96830984 | ||
| 4 | 36943 | 2426 | - | 2485 | = | -59 | * | (70 | / | 284) | = | -14.54225351 | ||
| 5 | 36945 | 2462 | - | 2528 | = | -66 | * | (69 | / | 284) | = | -16.03521124 | ||
| 6 | 36947 | 2454 | - | 2552 | = | -98 | * | (35 | / | 284) | = | -12.07746473 | ||
| 7 | 36950 | 2527 | - | 2567 | = | -40 | * | (37 | / | 284) | = | -5.2112676 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Longfellow Elementary | -56 | ||||||||||||
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 | 37137 | 2403 | - | 2436 | = | -33 | * | (75 | / | 337) | = | -7.34421362 | ||
| 4 | 37138 | 2450 | - | 2485 | = | -35 | * | (71 | / | 337) | = | -7.37388722 | ||
| 5 | 37139 | 2435 | - | 2528 | = | -93 | * | (77 | / | 337) | = | -21.24925808 | ||
| 6 | 37140 | 2535 | - | 2552 | = | -17 | * | (50 | / | 337) | = | -2.52225518 | ||
| 7 | 37141 | 2506 | - | 2567 | = | -61 | * | (33 | / | 337) | = | -5.97329373 | ||
| 8 | 37142 | 2568 | - | 2586 | = | -18 | * | (31 | / | 337) | = | -1.65578634 | ||
| Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Longfellow Elementary | -46 | ||||||||||||
Last steps
Compute the average
| 2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
|---|---|---|---|---|---|---|
| -67 | -48 | -61 | -56 | -46 | -278.0 | -55.6 |
Compute the Upper Control Limit
Simply compute the standard deviation and multiply by 3 and add to the average: -31.6
Compute the Lower Control Limit
Simply compute the standard deviation and multiply by 3 and subtract from the average: -79.6
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 | 76% | 89% | 78% | 90% | 81% |
| Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |
Compton Unified school district | County of Los Angeles
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.
Longfellow Elementary math proficiency
Zero+ meets standard.
71% less $meal
85% less $meal
74% less $meal
85% less $meal
77% 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.