Thanks Dave (Mr. Black). Today we finished up our discussion of the development of the origin of the Moon theories and I used these great drawings done by Dave Black a former colleague. Dave did this as an overhead–it was scanned and made into a pdf to import into a Smart Notebook page. I can add notes to the drawings on the Smart board and save the file for absent students. Dave would be amazed! I worked with Dave for 10 years until his retirement in 2003 (at age 56 and 35 years of teaching). Dave was an artistically creative teacher who made the coolest paper models for students to build (coastal geology, alpine glaciers, cave morphology to name a few). He passed away suddenly in 2006 and we all miss him. Every time I use one of Dave’s diagrams or models I am reminded of his love of Earth and Space science.