Thatcher supported Lord Rothschild's 1971 proposal for market forces to affect government funding of research. Although many scientists opposed the proposal, her research background probably made her sceptical of their claim that outsiders should not interfere with funding. The department evaluated proposals for more local education authorities to close grammar schools and to adopt comprehensive secondary education. Although Thatcher was committed to a tiered secondary modern-grammar school system of education and attempted to preserve grammar schools, during her tenure as education secretary she turned down only 326 of 3,612 proposals (roughly 9 per cent) for schools to become comprehensives; the proportion of pupils attending comprehensive schools consequently rose from 32 per cent to 62 per cent. Nevertheless, she managed to save 94 grammar schools.