The approach that I created to keep track of updates that students made to their Google Sites was to create a weekly upgrade assignment in Google Classroom. Every week students included a new page to their sites. They then had to react to the assignment with a link to the new pages they made in their Google Sites..
In this short video I show how to keep an eye on updates to students Google Sites by using Google Classroom assignments. The video shows a teachers perspective and it shows a students perspective of this method..

This post originally appeared on FreeTech4Teachers.com.
If you see it in other places it has actually been used without authorization..

Google Sites can be a great platform for students to use to preserve digital portfolios. I did that last year with my computer system science concepts students. The challenge for an instructor when students use Google Sites for portfolios is keeping track of updates to those portfolios..