They check there answers using history, like they use primary sources etc.
Answer:
Without a twelve month calendar, people would not know how to meet up at the same time. People would say, see you in 218 days, and they wouldn't be able to plan far in the future. Without a number system, we could not pay for things, and without wheels we could not go anywhere and lots of technology would become obsolete.
Explanation:
They were all ways of combatting the immense poverty caused by the depression. The shantytowns were ways for the poor to have cheap housing, as terrible as those towns often were, they were a place for people to stay. Soup kitchens and bread lines were a way for people who couldn't afford food to get things to eat.
Answer:
There are a total of six goals.
1. To form a more perfect union
2. To establish justice
3. Domestic tranquility
4. Provide for the common defense
5. To promote the general welfare
6. Secure the blessings of liberty