Report by HM Inspectors on a survey of mathematics in the primary schools in the Ruthin and Llangollen areas of Clwyd : inspected during Summer term 1986 : Adroddiad gan arolygwyr ei mawrhydi ar arolwg o fathemateg yn ysgolion cynradd ardaloedd Rhuthun a Llangollen, Clwyd, arolygwyd yn ystod Tymor yr Haf 1986.
Great Britain.Welsh Office.Education Department.Inspectorate.
Cardiff : Welsh Office, Education Department,
1988.
Mathematics