LONDON (Bloomberg) The UK opened a consultation on how to tighten the rules for issuing visas to foreign students, as the government looked for ways to meet Prime Minister David Cameron’s pledge to bring net annual immigration below 100,000.

Ideas under consideration include cutting visas for study below degree level or tightening the language requirement both likely to hit the UK’s English-language colleges more inspections of institutions and limiting students’ right to work when they finish their courses.

“We must be more selective about who can come here and how long they can stay,” Immigration Minister Damian Green said yesterday in a statement in London. “Too many students coming to study at below degree level have been coming here to live and work, rather than studying. We need to stop this abuse.”

Cameron pledged before the May election to reduce net immigration from outside the European Union to below 100,000 people a year, half the level of 2009. Last month, the government imposed a cap on worker visas, while leaving room for companies to bring in highly paid staff.