Here is a list of some of the top websites to get information about Model United Nations (MUN)
BestDelegate
best delegate has a bunch a very useful articles about MUN. You can find many of there resources here – https://bestdelegate.com/resources/
un.org/mun
The UN.org has a new section that gives some nice information about MUN all on their site – https://www.un.org/mun. Unfocahttly they do not provide much info about MUN strategy just the dry information about MUN.
AMUN
amun.org is a nice site that has some really good information about teaching MUN.
AllAmericanMUN
The team at all American MUN seems to have a growing db of MUN training and tutorials. allamericanmun.com/tutorials/
WiseMee.com
WiseMee has some amazing MUn guides and resources made by some leading MUNers. https://www.wisemee.com/mun/delegate/