Aleigh was found dead last Tuesday, and police are calling her death a homicide.
A steady line of cars turned into the Kents Hill prep school Sunday afternoon.
Mills was a 2006 graduate of Kents Hill, where she was captain of the varsity basketball team.
She had been attending the University of Maine at Augusta, and was about to start her sophmore year.
Mills was found dead at her parent’s home in Wayne, and investigators are still looking for her killer.
Aleigh’s family has requested that any gifts in her memory should be sent to the Aleigh Mills Memorial Fund at Kents Hill school.
The address is po box 257, in Kents Hill, 04349.