What is contained in an expat package in Ottawa, Canada?

Hi Is there a difference between a local employment contract and an expat package in Canada? Do the expat packages in Canada normally include private health insurance, assistance with school fees and flights back to the home country once a year? (I understand that everyone is entitled to free public health care. And that there are no school fees in a state school) Or is it the case that all arrangements have to be made by the employee, who is responsible for his family's school fees (if in a private school), medical bills (like orthodontic treatment) and flights back to the home country. Thanks P