Keep subscribers out of the admin area

I’m making a new WordPress site where I want users to register as subscribers but I don’t want them to have access to the WordPress admin area at all. So I’m looking for way for all admin pages (in the wp-admin directory) to check if a logged in user is a “Subscriber”, then redirect them out to the public homepage (not the admin homepage).

I’m having a hard time figuring this one out. Any ideas?

Thanks!
Christiann