The articles of confederation: the agreement among the 13 original states of the US that served as its first constitution.
Ratification: an action of signing or giving formal consent to a treaty making it officially valid.
Full faith & credit: it is article IV section 1 of the US constitution, and it addressees the duties that states within the US have to respect the public acts, records, and judicial proceedings of every other state.
Shays rebellion: an armed uprising in Massachusetts during 1786 and 1787. American Revolutionary War veteran, Daniel shays, led 4,000 rebels & protests against perceived economic and civil rights injustices.
Hope it helped. :)