Every user has access to a personal space that can be used to keep a portfolio of work. (Parents also have access to their children's portfolio.)

In Vidigami, the student's work (portfolio) is kept in their personal tab, which can be found by clicking on the student's name in the sidebar:

From here, click on the "Created by Me" Tab:

This will display the current images that consist of the user's portfolio. Teachers, parents and students can tag work as "created by" in order to appear in this section. A teacher, for instance, can upload a photo of a child's work and tag the "created by" section with the student's name. It will automatically appear here for the student and parent to view. 

Here is an article with more information on how to tag so you can build up your child(ren)'s portfolios!