Radiation Basics Made Simple

This resource is a training module that introduces participants to the fundamentals of radiation and radioactivity. It features an enhanced lecture-style video and interactive knowledge checks toto deliver and reinforce key concepts. The training is divided into eight segments: Sources of Radiation, Radioactive Decay, Measuring Radiation, Biological Effects of Radiation, Radiation Protection, Decontamination, Environmental Impact of Radioactivity, and Responding to Radiation Emergencies.

http://emergency.cdc.gov/radiation/radbasics.asp