Studyladder is a highly effective, logically organised, Mathematics and Literacy program. It has been developed by experienced educators to inspire and motivate learning. It is suitable for Primary and Junior High School students and is very easy to use - students simply login with a username and password to access all the learning materials.
This is a superb site with thousands of well designed cross curricular activities, whiteboard resources and videos to use in your class. Best of all, it is free for teachers.
http://ictmagic.wikispaces.com/Cross+Curricular