Jennifer agrees with Lev Vygotsky that learning is a social interaction within the zone of proximal development and that learners and mentors continually adjust to each other. Her approach to education is

Despite the proven benefits of regular aerobic exercise, most Americans spend about ___ times longer watching television than they do participating in sporting activities

a. 10 b. 8 c. 6 d. 4

Around age 2½, the video deficit effect

A) declines. B) is strongest when videos are interactive. C) increases. D) is strongest when videos are rich in social cues.