Removing certain parts of the sidebar in the dashboard

So I don't want my users going in the backend and fiddling with the settings, I just want to allow them to access the posts and such, basically just removing the tabs off the dashboard but if I were to type the link in I could still access the stuff. I was contemplating about going in by hand and removing it all. Decided I would ask here to see if there was any ideas or advice. Thanks!