The document summarizes the top 10 things the author learned in an "i3cs21" course. Some of the key things learned include: 1) A wiki is a collaborative space for content, not a character from Wicked. 2) A blog is an interactive bulletin board organized by topics, not marshland. 3) Becoming a digital nation requires civic responsibility. 4) Teachers can use many Web 2.0 tools to enhance student learning. 5) Google Reader is a web feed aggregator. 6) YouTube allows learning anything by watching videos. 7) Facebook helps connect with people while Twitter allows sending and reading tweets. 8) One should think digitally. 9) Technological progress requires social consciousness. 10