They've already presented the websites!

Make sure you tell them about how cannabis became illegal in 1937 when Harry J. Anslinger created his "Reefer Madness" campaign which targeted mostly Hispanics and African-American jazz musicians. These laws are racist in origin and it is used to control minorities.

Make sure you tell them that marijuana and drug prohibition is the same as alcohol prohibition of the 1920s and that it only creates crime and criminals get rich from artificially inflated prices. Let them know that prohibition corrupts politicians and it is unconstitutional.

Also, let them know that cannabis has been used as a medicine for thousands of years and that the drug companies don't want it legal because they will loose on profits.