Old Software or Open Source?

"I teach a high school multimedia course. We were scheduled to get new software this year but due to several pointy haired bosses, no software was ordered. The software I have to teach is Flash 5, Dreamweaver 2000, Photoshop 7 and (god help me) Movie Maker. The question is: is it better to teach old commercial software or their open source counterparts (Komposer, Gimp, etc.)? Is the steep learning curve and slightly less uniform design worth a little student frustration to teach them software written in the past 5 years?"

Ask SlashDot: http://ask.slashdot.org/askslashdot/07/12/05/1521237.shtml