According to the text, approximately what percentage of adolescents reported using a contraceptive during the first time they had sex?

___________ describes a process in which the brain reduces unnecessary neural connections.

Fill in the blank(s) with the appropriate word(s).

Discuss the major theoretical differences between child-centered and teacher-directed early childhood education programs. What theories underlie child-centered programs? What theories underlie teacher-directed programs?

What does each type of program emphasize in its work with young children?