A teratogen is any agent — such as a drug, disease, or environmental toxin — that can harm prenatal development.

sexually transmitted infection 

A toddler calls every four-legged animal a “doggie,” including horses and cows. This is an example of:

Which of the following BEST describes cooperative play?

Baby Devon reaches for a toy but stops searching for it as soon as it is hidden under a blanket. This suggests Devon has NOT yet developed:

Vygotsky’s zone of proximal development refers to the range of tasks a child can accomplish with guidance from a more skilled partner.

Gender schema theory proposes that children develop their understanding of gender by:

Which of the following sequences CORRECTLY orders the progression of language development?

Five-year-old Marcus pours juice from a tall, thin glass into a short, wide glass and insists there is now “less juice.” This demonstrates a lack of:

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