One of the problems facing the education technology community is institutional memory loss. (I'm sure it affects every community, but my field of expertise is ed tech.) This occurs when an organisation's or a community's wisdom is lost over time.
The reason may be a sudden, and in my opinion ill-judged, decision by a new headteacher to get rid of older (aka more expensive) staff. Yes, money will be saved, which in an era of diminishing budgets is more important than ever, but 'hidden' information will be lost.
cross-posted at www.ictineducation.org
Terry Freedman is an independent educational ICT consultant with over 35 years of experience in education. He publishes the ICT in Education website and the newsletter “Digital Education."