If You Liked Wonder by R.J. Palacio… you might also like:
Absolutely Almost by Lisa Graff: (J GRAFF) Ten-year-old Albie has never been the smartest, tallest, best at gym, greatest artist, or most musical in his class, as his parents keep reminding him, but new nanny Calista helps him uncover his strengths and take pride in himself.
Joey Pigza Swallowed the Key by Jack Gantos: (J GANTOS) To the constant disappointment of his mother and teacher, Joey has trouble paying attention or controlling his mood swings when his perscription medicine wears off and he starts acting wired.
Out of My Mind by Sharon Draper: (J DRAPER and YA DRAPER) Considered by many to be mentally retarded, a brilliant, impatient fifth-grader with cerebral palsy discovers a technological device that will allow her to speak for the first time.
Save Me a Seat by Sarah Weeks: (J WEEKS) Ravi has just moved to the United States from India and has always been at the top of his class; Joe has lived in the same town his whole life and has learning problems–but when their lives intersect in the first week of fifth grade they are brought together by a common enemy (the biggest bully in their class) and the need to take control of their lives.