CAUSE is a national organisation in the USA devoted to the advancement of undergraduate statistics education. It has tutorials and more
Chris Wild and colleagues at the University of Auckland have created a MOOC to teach statistics using visualisations which support conceptual understanding. The MOOC is great! BUT you can get a lot from just watching the videos
Computer-Assisted Statistics Textbooks Doug Sterling has created a set of electronic textbooks that cover statistical methods often encountered on introductory statistics courses.
Statistics Online Computational Resource (SOCR) provides portable online aids for probability and statistics education, technology based instruction and statistical computing. SOCR tools and resources include a repository of interactive applets, computational and graphing tools, instructional and course materials.
Open Learning Campus. The OLC is an open, interactive learning resource focused on global development.