New to the site, so here come the dumb questions

Ok I teach bio./chem./calculus (and anything else that comes my way)....
For biology (and chem.) I've been using some up to date material (esp. for genetics) found in magazines like discover, scientific America, popular science....etc....
Are there any deals for teachers to subscribe to these kinds of magazines.... I don't mind buying them.... but when you’re buying 4-6 a month it starts to add up...
Thanks