The Autocrat Add-On is a great way to take a spreadsheet and input the data into a Doc or PDF template. You can make certificates, letters, and more using that. At NBC, we have used it to take student test submissions from a form to create separate documents. Then teachers can grade and/or comment and share back with each individual student. Here is a Google Doc I created to give step-by-step assistance with the staff in that process:
Teacher, Librarian, Writer, Technophile.