Why is it important to know the importance of the Declaration of Independence for an ap gov class ?

Because they may have you say/recite it and you need to know that because it is one of the main things of government.

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.