RT @marienabbout: Proposals for show cases and interactive posters are open to all GeoGebra users, experts who would like to share their ex…
Retweeted by Greg McVerry; original attribution is retained below.
RT @marienabbout: Proposals for show cases and interactive posters are open to all GeoGebra users, experts who would like to share their ex…
By Greg McVerry · Permalink · Original tweet
