[center][img]https://www.geogebra.org/resource/ztmnxqkr/CHS4oANgJl1FPWcL/material-ztmnxqkr.png[/img][br][/center][justify][/justify][center][/center][justify][/justify][justify]I am degree in Mathematics from UnB, a Master of Science Teaching from UFRPE and a PhD in Education with an emphasis on Technology from UnB. Author of the 1st and 2nd editions of the books “Aprendendo Matemática com Cabri-Géomètre II (volumes 1 e 2)”, “Aprendendo Matemática com Cabri-Géomètre II e II-plus (volume único)” and “Aprendendo Matemática com o GeoGebra ”. Adjunct professor at the Federal University of Santa Catarina (UFSC). Collaborator at the International GeoGebra Institute. [url=mailto:jcassio@gmail.com]jcassio@gmail.com[/url] or [url=mailto:jorge.cassio@geogebra.org]jorge.cassio@geogebra.org[/url][/justify]