A first study of the effectiveness of The Great Race number board game when played in small groups on children's numerical knowledge and a second study of paraprofessionals' behavior impact on children's learning during board game play, the first study based on data from 62 Head Start children from 6 Head Start classrooms and the second study based on 105 Head Start children from 7 Head Start classrooms, with both studies taking place in a mid-Atlantic metropolitan area