I thought this activity would be a relatively humdrum exercise on language of preference, comparison, description, etc., but some of my classes got really into it. Take six images--I usually use ads because they're frequently designed to be colorful and attention-catching--to show students, one by one. Individually or in teams, they must evaluate each one based on the five criteria listed. Depending on level, I usually give between 1 and 2 minutes a picture. At the end, I lead a group discussion about how they've evaluated and interpreted the images--it can actually lead to really interesting debates about the relative merits of the photos, their content and meaning, etc.