This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
The way we do it is one assignment at a time - this usually goes back and forth a few times, and once you receive the instructor's solution to the assignment you are working on, you can submit the next one for nitpicking.
Usually, you will have amendments you'd like to make to the next assignment by the time you finish the first one
Also, I'm sure you've already been informed that your display name needs some tweaking to adjust to the naming policy. We don't have a whole lot of rules, but this is one that we take very seriously.