And, let's just for a moment, take a look at what participation really looks like at Mass. Some liturgists will foam at the mouth when they explain that unless someone is actively singing EVERY. SINGLE. SONG. there lacks "active" participation among the members of the congregation. In reality, the participation should be measured not by some external governing board but by the individual themselves. I mean, how do we ever know if someone is prayerfully participating on the INSIDE? We can't know...and it really is none of our business what a person's relationship with Jesus is in any given moment during the Mass. Yet, if we need to look to some external metric, then perhaps we can judge it by how well the congregation is entering into the responses and acclamations. If liturgy is truly the work of the people, then what's most important is for the congregants to sing, say, and pose in those moments where our participation CONSTITUTES THE LITURGICAL ACTION ITSELF (responding the the psalm, acclaiming our faith during the reponses to the Eucharistic dialogue, etc.). Simply singing one of the songs in the "four-hymn sandwich" only ACCOMPANIES some sort of liturgical action and therefore is not as important as the liturgical action itself (and why we're not singing the Propers from the Graduale as called for as the primary choice in liturgical music at Mass is beyond me...but I digress; that's an argument for another time).
If you (and by you, I mean well-intentioned but poorly formed campus ministers and music directors) want the student body to participate, first, analyze your own expectations of what "participation" looks like. Second, become better catechized yourself...this way you can effectively impart to your students what proper reverence and adoration in the liturgy actually is and inform them of their important role in it so they can better (and more naturally) enter into the full worship of the Most High, the Lord, Jesus Christ.
(Oh, as a side note, please, please, PRETTY PLEASE, tell the girls, especially those who are liturgical ministers at Mass, to dress appropriately. It really is not nice to make parents who are visiting spend all that time worried like mother hens that any wrong move by any number of girls will result in a tragically embarrassing wardrobe malfunction. Thank you.)