Private posts – available only to registered users?

Hey folks.

I’ve been having quite a dig and can’t seem to get exactly what I want from the available plug-ins. Situation is this – I have just got a job as a teacher so I want to go through my existing blog posts (over 1000 of them) and make some of them readable only to registered users.

The rest to be open publicly to users or non-users.

I’d prefer to have to approve users to make sure none of the pupils just find my blog and register themselves.

In addition, I’d like to be able to make future posts private or not.

I don’t want to use the built-in private posts feature where it relies on a password for each post. I can see that being a pain to set up.

Any advice? Thanks ??