The typical first-grader would begin school with a vocabulary of around words.

The typical first-grader would begin school with a vocabulary of around 10.000 words.

Explanation:

When talking about a kid's vocabulary, most teachers and psychologists are referring to the group of words that a specific child knows. The amount of words each child knows grows over time, and school plays a big role in this development. At 5 years of age, a typical first-grader will start elementary school with around 10.000 words in his/her vocabulary. After one year of attending school, that same child would have learned from 2.000 up to 5.000 new words.

slavery was so profitable, it sprouted more millionaires per capita in the Mississippi River valley than anywhere in the nation. With cash crops of tobacco, cotton and sugar cane, America's southern states became the economic engine of the burgeoning nation. Their fuel of choice?

Explanation: