I follow a number of education writers / academics on twitter and found the following list of people you might want to follow if you are a fan of the app.
When 140 characters isn’t enough (blog): 75 education people you should follow
I’d also add UKedchat to the list. Thursday nights dozens of teachers contribute to discussions on a wide-range of education issues and teaching strategies. I’ve raided their archive of discussions for ideas more than once!