Virtual Learning Environments
Disadvantage of VLE:

The disadvantage of VLE's is that for a non technical teacher they can sometimes appear be complicated to use.This can put some teachers off using them although many schools now require teachers to place work for their students on the school VLE.
  If the VLE is run 'in house'then it usually needs to be maintained and regularly backed up.This adds to the cost of running the VLE and some schools might not have network staff or a teacher who is willing  to undertake this extra work.
 Another problem with VLEs are that if the internet or networks is down,then the VLE cannot be accessed.