While the PocketMod, as previously mentioned on this blog, is a handy-dandy, cute as a button one-week planner for students, the site's availability seems to vary.
Plan B is this less cute, but just as effective planner from Victoria: http://www.vcehelp.com.au/resources/vcehelpstudyplanner.pdf
So if you have a mentor group, or year group, or kids needing study/organisational help, this might be just what you're looking for. More than a grid, but less (alas!) than the folding and cutting fun and cuteness factor of the PocketMod. (Confession: I ended up making a version of the PocketMod using Publisher, just to share with my kids here. But the VCE planner is a good one too).