Tim Holt

education oer tim holt professional development connected educators teaching and learning pdf active learning ed free materials technology edtech open education resources #steam #tcea #stem public domain creative commons wikimedia ck12 pd edu classrooms twitter social media edpd education technology websites blended learning cast science conference cast2014 stat minicast lora holt tnt14 yisd digital texts textbooks etexts texts instructional technology ed tech keynote 21st century