In the United States, about what percent of 1-year-old infants are able to stand by themselves and take their first step?

Which of the following teachers is likely to be most effective?

A) one who spends much time disciplining students, thereby creating a quiet classroom B) one who understands that some students will not learn regardless of the type of instruction C) one who teaches students techniques for monitoring their own learning

Brenna's attitude about shoes would be composed of all of the following components EXCEPT

a. emotional reactions. b. behavioral tendencies. c. self-perceptions. d. thoughts and beliefs.