Online lecturers Chris and Becca Martenson know tackling the economy is no easy task. But that doesn't keep them from trying to break it down for the layman. In Chris' evening discussion tonight and the couple's weekend-long seminar, learn about the interplay between money creation, debt, and energy. Fri 7 p.m., Tivoli Turnhalle, 900 Auraria Pkwy., 303-556-2755, $5 Sat-Sun 9 a.m.-4 p.m. The Curtis Hotel, 1405 Curtis St., 303-571-0300, $149-$249 More: How to Reduce Spending, Sat, July 18 | How to Start Your Own Small Business, Tue July 21 | First Time Home Buyer's class, Tue, July 22