__________ percent of the population has IQ scores between 70 and 130

Which of the following is not a method used for teaching children with an autism spectrum disorder to communicate?

a.) augmentative communication systems b.) sign language c.) simultaneous communication d.) All of these methods are used to teach children with autism to communicate.

According to the CDC (2008), about ____ of American adolescent girls and ____ of boys in grades 9–12 report engaging in eating disordered behavior in the past 30 days

a. 20%; 10% b. 15%; 7% c. 10%; 4% d. 5%; 1%