Just wondering as there seemed a bit of interest in some of these plots if you are just looking for reruns or if they never got off the ground.
2 and 3 definitely sound fun... And to add something here's an idea a played in a chat a while back that was great fun:
Summertime and the students seem more eager to attend the local lake than classes. So the poor history teacher finds himself distraught when even his best and most attentive student seems to be very absent minded. He tells her to stay behind after class as he wants to find out if anything is wrong - if she has problems at home. Turns out she admits after a bit of probing that she's seen some boy's cocks for the first time while she was at the lake yesterday and since she's had bit of a soft spot for her teacher she wondered what his would look like.
To make things worse: when he dismisses her (so he can wank off at the though) she drops her bag and starts moving around on all fours to pick up her stuff. As he helps her he gets more than enough looks at her cleavage and ass and as she stand up in front of him - he realizes she's not wearing panties under her short uniform skirt...