ISD's and Charter Schools compared, Snapshot 2014 Data

The following data is from the valuable Snapshot pages that provide 98 critical data items on each school district in Texas, both charter and ISD district, going back 20 years.  Notice the differences.  Go to the web site at https://rptsvr1.tea.texas.gov/perfreport//snapshot/ to see the data on any school district you are interested in.   Below is a summary of 2013/14 data posted online last summer. Each summer another year is posted.  The data is captured in three pages.  Click on them to enlarge them for study.  Many questions are indicated by this data:  Why do charters choose to pay teachers less when they get more operational money per student than ISD's?