Why does Ofsted have a different meaning of satisfactory to the rest of us?
This BBC article on maths in schools claims "The effectiveness of work in maths was judged to be outstanding in 11%, good in 44% and satisfactory in 40% - by an inspectorate which regards "satisfactory" as not being good enough."
Yet the OED says:
Satisfactory - Sufficient for the needs of the case, adequate.
which sounds suspiciously like "good enough" to me.