Janet,
One of the best ways to provide the feedback to students is through the Sandwich method (found in other postings on this site). The Sandwich method suggests that you provide the student a little positive feedback on what they did, provide the issues/criticism, then close with a little more positive feedback. This way you "sandwich" the negative with two positive comments. This way the student hears what is wrong, but also is reassured that something they did was good.
Herbert Brown III
