Sir, - The key point that Kevin Lewis (January 5th) makes - that teachers engage in "unmeasurable" activities every day - is clearly true. However, he must accept surely that there are good teachers and there are bad teachers. Assuming he is one of the former, is he willing to continue to be paid the same as a bad teacher - or should mediocrity be accepted as the standard for all? - Yours, etc.,
John Healy, Melrose Avenue, Fairview Dublin 3.