My three year old sleep quite well in the afternoon at home, but does not sleep in the day care, perhaps due to so many kids being around. How can I help her sleep again?

i think initially it's a big change for her, so she may not be able to relax and sleep the way she did at home. and with so many kids around, i am sure there's a lot of noise as well, which could prevent her from sleeping. once she settles down, she will gradually start feeling more at ease and may even sleep when she feels tired. if it is allowed, ask the staff if you can send a favourite sleep toy along.