Lightroom Print Template Question

I've made a print template in Lightroom to be able to print several differnt size pictures of each student on one sheet of paper. Now I have about 30 first-graders that I would like to print using this template, one template per student. I'm having to manualy load each student's picture into the template before I print. This is very time consuming. Is there any way to get Lightoom to do this automatically? Thanks for your help!