nini,
not sure why the principal suggest that to you. i thought usually we lengthen the period of stay for them and not shorten. i feel that if you shorten the time there as days goes, he might think that he don't have to be there soon.
what i did for yu ze is 1st day half day leave even before lunch and bath. just had breakfast and snack in cc.
2nd day onwards, stay whole day. cos he take school bus, so its different from briaden. i accompany him to take school bus to and fro for 1st 2 days. 3rd day morning i went with him and evening trip, he came back on his own. after that its all on his own liao.
my suggestion for you will be
1st day - let him have his breakfast and snack there. bring him back before lunch and that's it.
2nd day - let him stay for lunch and bath then you bring him back or better bring him back after his nap. it should be around 3.30pm.
3rd day - let him stay throughout. just pick him up as per what your timing in future.
if you think this is too fast for him, maybe can repeat day 1 twice and day 2 twice then whole day. please don't be a stalker at cc cos braiden will sense it and he will take longer to settle down.
1st day, i stay in class with yu ze throughout and cry with him cos he cry badly whenever i walk out of class. then i heartpain went in to hug him and calm him down end up crying with him. 2nd day, i really just pass him over to the teacher and let him cry. then i don't even turn back and just walk out. when i go back to peep during nap time, teacher say he stop crying quite fast.
don't have to worry too much for the teachers, they have seen and handle so many children before him. you must be able to let go and let them handle. its harder for them to manage if you are around.