Here are lists of websites I use in my classroom. Websites that require user names and passwords have already been set up by me and the students should know their user name and password.
Ticket To Read
Math Playground
Starfall
Webcams at National Zoo in Washington DC
ABCya
number worlds
Moby Max-User name and password required
Interactive Sites for Education
Fun Brain
Arcademic skill Builders
Oxford Owl-Math and Reading games plus online books for students to read.