/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: HansHak https://cdn.slidesharecdn.com/profile-photo-HansHak-48x48.jpg?cb=1523274606 Ik ben leraar sinds 1982 en e-learning evangelist. Zie mijn website http://www.walhak.com en mijn Linkedin profiel