Too many sheets! I came across the problem of having a large number of visible or unused sheets in cluttering up my Google Spreadsheets often enough that I decided to solve it.
He owns a typewriter and collects Laserdiscs. He loves his three children quite a bit (aged 11, 16 and 18). He is passionate about authentic learning, technology with purpose, and creating at least one new thing every day. In short, he teaches, and learns. A lot.