These Blogs are (largely) automated and (usually) based on the spreadsheet of blogs found here. They blog posts consisting of the first few words and a link to each new blog post from a selected category of education bloggers.
Subject blogs (i.e. collecting all the education blogs written by teachers of a particular school subject, or about a particular subject).
The Art Echo Chamber Maintained by @pennyprileszky
The Business and Economics Echo Chamber Maintained by @MintSpies
The English Echo Chamber On Twitter: @eng_echochamber Maintained by @pjmerrell
The History Echo Chamber On Twitter: @HistEchoChamber Maintained by @teach_well
The ICT and Computing Echo Chamber On Twitter: @CompEchoChamber Maintained by @eaglestone
The Literacy Echo Chamber On Twitter: @LitEchoChamber Maintained by @ThinkReadTweet
The Maths Echo Chamber On Twitter: @MathsEcho Maintained by @Just_Maths
The PE Echo Chamber On Twitter: @PEechochamber Maintained by @ImSporticus
The RE and Philosophy Echo Chamber On Twitter @REEchoChamber Maintained by @iTeachRE
The Science Echo Chamber On Twitter: @sciechochamber Maintained by @A_Weatherall
Sector Blogs (i.e. collecting all the blogs from a particular sector of the education system).
The FE Echo Chamber On Twitter: @FEechochamber Maintained by @clyn40
Role blogs (i.e. collecting all the blog posts from bloggers with a particular position)
The Governor Echo Chamber On Twitter: @GovEchoChamber Maintained by @5N_Afzal
The Headteacher Echo Chamber On Twitter: @HTechochamber Maintained by @bekblayton
Others:
The Echo Chamber International (My personal selection of blogs from around the world, not actually based on the spreadsheet.) On Twitter: Maintained by @big_mean_bunny
Echo Chamber Uncut All the education blogs by bloggers in or from the UK. On Twitter: @EchoChamberUncu Maintained by @oldandrewuk