Utah pays for Utah Write for 5th graders, but it is a very affordable option for other grades as well. Take a look at what Utah Write can do for you and your students including giving immediate feedback for students on their writing.
Utah Write www.utahwrite.com
Take a look at these two Math Practice programs and what they can do for you.
MOBY www.runmoby.com 30 day free trial, $199/year for 30 kids for 12 months
IXL www.ixl.com 30 day free trial, $59 teacher 12 months, $299 school 12 months unlimited