Reliable multi wireless temperature sensors

Hi,

I have some students that would like to build a device to monitor temperature in up to six different locations at once and feed back to a tablet. The distance would be about 50 feet max. I would really like some advice or tutorials on how to get started and what components to use. Unfortunately time to pick through information and learn things as I go is not an option on this project.

Thank you for any help I could get!