i have just recieved a letter from my sons school (he has just started year 4) informing me that as his teacher needs to assist the head, a HLTA will be covering the whole classes lessons (unsupervised) for 2 full days for the whole of the year. Is this suitable/legal? ii thought due to the amount of time they would of found a teacher to work part time to teach the class. Can anyone enlighten me?