### Bellflower High (Data source)

##### Source data for Bellflower High

#### 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 |
||

7 | 634592 | 2488 | - | 2567 | = | -79 | * | (457 | / | 1271) | = | -28.40519276 | ||

8 | 634595 | 2505 | - | 2586 | = | -81 | * | (445 | / | 1271) | = | -28.35955938 | ||

11 | 634596 | 2568 | - | 2628 | = | -60 | * | (369 | / | 1271) | = | -17.4193548 | ||

Step 4 | SUM Weighted Distance From Standard to get 2015 Difference From Standard for Bellflower High | -74 |

#### 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 |
||

7 | 20267 | 2488 | - | 2567 | = | -79 | * | (409 | / | 1208) | = | -26.74751648 | ||

8 | 20270 | 2518 | - | 2586 | = | -68 | * | (431 | / | 1208) | = | -24.26158937 | ||

11 | 20272 | 2563 | - | 2628 | = | -65 | * | (368 | / | 1208) | = | -19.80132447 | ||

Step 4 | SUM Weighted Distance From Standard to get 2016 Difference From Standard for Bellflower High | -71 |

#### 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 |
||

7 | 20586 | 2490 | - | 2567 | = | -77 | * | (424 | / | 1230) | = | -26.54308942 | ||

8 | 20588 | 2524 | - | 2586 | = | -62 | * | (427 | / | 1230) | = | -21.5235772 | ||

11 | 20590 | 2541 | - | 2628 | = | -87 | * | (379 | / | 1230) | = | -26.80731705 | ||

Step 4 | SUM Weighted Distance From Standard to get 2017 Difference From Standard for Bellflower High | -75 |

#### 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 |
||

7 | 20577 | 2488 | - | 2567 | = | -79 | * | (391 | / | 1178) | = | -26.2215619 | ||

8 | 20579 | 2506 | - | 2586 | = | -80 | * | (415 | / | 1178) | = | -28.1833616 | ||

11 | 20581 | 2549 | - | 2628 | = | -79 | * | (372 | / | 1178) | = | -24.94736837 | ||

Step 4 | SUM Weighted Distance From Standard to get 2018 Difference From Standard for Bellflower High | -79 |

#### 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 |
||

7 | 20754 | 2485 | - | 2567 | = | -82 | * | (423 | / | 1162) | = | -29.85025812 | ||

8 | 20755 | 2505 | - | 2586 | = | -81 | * | (383 | / | 1162) | = | -26.69793453 | ||

11 | 20756 | 2568 | - | 2628 | = | -60 | * | (356 | / | 1162) | = | -18.3820998 | ||

Step 4 | SUM Weighted Distance From Standard to get 2019 Difference From Standard for Bellflower High | -75 |

#### Last steps

##### Compute the average

2015 | 2016 | 2017 | 2018 | 2019 | Sum | Average |
---|---|---|---|---|---|---|

-74 | -71 | -75 | -79 | -75 | -374.0 | -74.8 |

##### Compute the Upper Control Limit

Simply compute the standard deviation and multiply by 3 and add to the average: **-68.8**

##### Compute the Lower Control Limit

Simply compute the standard deviation and multiply by 3 and subtract from the average: **-80.8**

##### 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% | 79% | 75% | 73% | 79% |

Data source | 2015 data file | 2016 data file | 2017 data file | 2018 data file | 2019 data file |

#### Bellflower Unified school district County of Los Angeles

### THIS chart shows what the school system "wants"

### PLUS a "special" or "outside" cause of variation, parent education.

NOT what teachers want.

NOT what principals want.

NOT what parents want.

Bellflower High

*math*proficiency
Zero+ meets standard.

**64% less $meal**

**60% less $meal**

**56% less $meal**

**62% less $meal**

**67% 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.

#### High Schools (Public) schools in Bellflower Unified (2)

Bellflower High | Mayfair High |