The #TwitteratiChallenge, as I understand it, is to give a shout out to those you go to for support or challenge in the world of museum education. My challenger wisely said: "In a sense everyone who works in a museum or a gallery is involved in the education business to some extent, as just by being there they contribute to the informal education of the community."
I'm going to push the definition a bit further and give a shout out to a non-museum education worker who makes a substantial contribution to museums through support, encouragement and advocacy. In that line of thought, it's impossible for me to go past
I met Maree during Edith Cowan University's Certificate in Museum Studies in 2008. At the time she was a primary school teacher but now works as a curriculum consultant. She helped with the development of the Australian History Curriculum and actively encourages museums and teachers to work together.
Others directly in the world of museum education, who I follow on Twitter, are @Janpcim and @JoClyne1, who are both in Victoria. It's outside of the museum sphere but another inspiring educator is school teacher @BhavneetSingh12 who heads up the TeachMeet movement in WA (#TMWA). I think the museum world could learn a lot by the way teachers are banding together and developing both their networks and professional development.