It is unfortunate that many schools don't have the capabilities to do this (not enough ipads, laptops, computers in classroom, bandwidth, wi-fi, money, etc.) but I do like the idea. I have used forums and such for independent novel studies and interactive class activities in the past, but I would love to use blog portfolio's for students. It would be interesting for them as well to have and be able to look back on.
The post explains:
I have always used formative assessment in my classroom, but our digital portfolios give me much richer information than our paper portfolios ever did. Because my young students are still beginning writers, it is often difficult for them to explain their learning through writing. They can, however, explain their learning verbally. There are lots of apps (including my current iPad favorites Educreations and Draw & Tell) that record voice over an image. These digital artifacts allow me to understand a child’s thinking in a much deeper way.
The beauty of digital portfolios is that as the children and I are constantly assessing their learning in a formative and summative way, the students are also demonstrating their growing knowledge for a wide audience and learning about digital citizenship and appropriate online behavior. What great by-products of the assessment process!
Please check out the entire article here: http://plpnetwork.com/2013/05/30/digital-porfolios-thinking-assessment/