"This activity can be used during a science unit on animals. It can also be used as an assessment if a rubric is used." For elementary students, this writing assignment is cross curricular and designed for second grade, but could be adapted. You can align with common core.
Some ideas for creating eportfolios with Google sites. This website has some templates and ideas for eportfolios if you want to use this in your classroom. This website has a lot of resources and is a great one to discuss ideas and find how-to tutorials.