- Registered members pick up your Backpack. Problems using the site See site requirements. Main Menu: Backpack: Tools: Webmaster: croftsh@gse.harvard.edu ENT: Quick Links Welcome Center Introductory Materials Introduction to Teaching for Understanding Rationale for using new technology with TfU Building a Community of Practice The Village Metaphor: How this community is being designed Walking ...learnweb.harvard.edu/ent/home