First thing you need to do is print enough pages for ONE SHEET PER STUDENT that way they have different stamps to write about. Each sheet has an event and/or person to report on. The rubric should only be used as a guideline for their limited writing. You MAY want the students to write on the back if needed or use a 'word count' if you choose.
Over the years I have used both lengths due to my needs of my students. I have had them write in pencil or in ink.
This middle school project was built after looking over James Moran and his Secondary American History Connections with Postage Stamps.