I'm looking for the best way to germinate a large number of avocado seeds. Suspending them one at a time in a cup of water (with toothpicks) is too much hassle and takes up too much space. I'm currently placing groups of 6-7 seeds in a shallow container of water, changing the water regularly, and waiting until I see signs of a sprout...then planting the seed (or the seed half).

If there are other methods that people have used, I'd like to hear about them.