Sources of science materials?

["Debra W. Waugh" <dwaugh@PEN.K12.VA.US>]

I am at a point that I would like to put a large amount of funds
into updating the science collection at my school with both
books and CD-ROM sources.

I've found however that I'm receiving very few catalogs from
jobbers handling science materials.

Can anyone recommend jobbers/publishers/distributors that
provide science materials at the 9-12 level{?

Please respond to me at dwaugh@pen.k12.va.us.

Thanks!