First time round, I went and bought a snazzy one...I think it was called the 'Ultimate Kneeboard' then. Then went off to fly big aircraft, with places for clipboards and checklists, so didn't use the kneeboard. Then had some stuff to do in smaller aircraft, but couldn't find my 'Ultimate'. (It must be in storage at my parent's attic.)
No chance I was paying for another snazzy one, so made one.
1. 2 Clear plastic A5 clipboards.
2. Cut the bottom of one about one third of the way up (This will make a pocket to slip things into). Line the bottom half of the cut one with the bottom of the full one. Drill holes neatly around the edge of the full one and the bottom part of the other. Also space the wholes as for ring binders.
3. Buy a pot of binding rings.
4. A5 sturdy clear plastic wallets
5. Stick some sturdy clear plastic CD wallets onto the front of the A5 wallets.
6. Thread some shockcord to fasten both bits of clip board. Make a strap and learn how to tie a good quick release knot!
Put it all together, and hey presto you have a knee board. Total cost: $18USD. Much fun putting it together, and you stand out from the crowd.