But critics fear that students and teachers will be penalized for bad scores on tests they are ill-prepared for, and some parents are refusing to let their children take the tests.
The British Medical Association has said it has received anecdotal evidence that some companies were flouting the code and pressuring people to taketests.
And, as PC World tests show, users may experience some IE5 culture shock if they take advantage of the customization features that tie the browser to particular Web portals.