This week is Global education week. To celebrate the Global Education Conference, an free online conference, is hosted online. I have extracted all the maths related sessions here, but the full schedule for South African time can be found here: http://www.globaleducationconference.com/schedule-gmt2.html
Click once on the session to see a description and a link to the virtual room. All the sessions will be archived so that you can listen and watch them afterwards. No registration is needed, but check in about 10 minutes prior to a session starting so that can make sure that everything is working.