In reply to Offwidth:
In the ten years I've been instructing on the Roaches, I don't think the rope groove on top of Prow Cracks has got any deeper. You'd have to go out of your way to make the ropes actually run over that. I honestly can't imagine any SPA holder setting up a rope that would, unless they've trained and then assessed by an absolute moron.
Yes, Ramshaw is good too, but for complete novices I think the belays are harder to set up and the routes are generally more scrappy (bearing in mind the OP has only been climbing a year and his friends have never been). Although routes like "Leeds Crack" are normally quite good introductions.
Straying away from Prow Cracks area, I find the descent gully next to fledgling's climb is a great starting point, as is Chicken Run and the route to its left, plus those non-lines on Heather Slab, all somewhere between Mod-VD and generally with a nice selection of belays to attach to.