Yes, it's normal. It takes me a few days to get into full holiday mode. I've had a cold over the weekend and have been so knackered that I'm surprised I've managed to do anything today! I like to do bits for school in the first week off - kind of packing away the last year and doing some prep for the new year, but then once I've got into the swing of being off I don't usually do much until the last week. I won't be going into school until week 5 though as the cleaners are in. Personally, I think it's nice to do a few bits at a leisurely pace rather than the frantic pace during normal term time. I like to potter!