Pieter Dirk Greeuw @pdgreeuw Active 6 days, 15 hours ago ActivityProfileFriends 0Groups 0 PersonalMentionsFavoritesFriendsGroups Show: — Everything — Updates Friendships New Groups Group Memberships Group Updates Started Course New Lessons New Topics Lesson Complete Topic Complete Course Complete Lesson Comment Course Comment Quiz Completed Pieter Dirk Greeuw became a registered member 5 years, 2 months ago