The image on the bottom left shows 10 crates. That leaves 2 extra for 8 students. I would suggest using these 2 empty spaces for "community" items such as scissors, markers, crayons, rulers, pencils, glue, etc.
For those of you who are THINKING about going desk-less, you could try a desk configuration shown in the photo at the top left. This gives you the look and feel of a table-like setting. Try it- if it doesn't work out, you've still got your desks!! Win-win!