The video conference is an obvious way of monitoring learning. My favourite way of getting students to demonstrate learning in the vc is by giving them seminars to do. They pick the topic and have to share their knowledge of it. I used to get students to submit work using the assignment tool in Moodle, but in the last couple of years I have been using google docs and it has made a significant difference. I am able to give ongoing feedback on student work at varius point during the week, just by inserting comments. If the students is on at the same time we can use the chat to catch up. It also allows the students to work together on documents or slideshows if they want. Just have to watch you don't mico-manage too much. This year we have a small number of teachers trialling Teacher Dashboard, whch hooks into google doc and give the teacher a panel where they can easily access all student work.