I see related questions on how to restrict access to certain websites but that is not really what I want. Here's my situation:
My baby sitter wants access to the internet but we we don't want her spending hours on the computer and neglecting our infant children. Thus, I want to be able to restrict her surfing to 30 minutes a session, with sessions being at least 3 hours apart. I do not care to restrict the content. Does anyone know what is the best way to implement this? Thanks.