Good luck with home schooling your kids. I am a school teacher and dont know alot about home schooling but if you can get your hands on the syllabus for the year that your child is in (they are all online and in the DET website) then I think that would be a good start. Have a look at the outcomes for English, maths and whatever else you want to teach your children and go from there.

Try to give your kids as much hands on learnign as possible more so than text book learning.
Both your boys aged 6 and 9 would still need to learn through this way before they can learn in an abstract way (like textbooks). When thinking of resources dont jsut think about text books. Think about great games that you can get or make, paddlepop sticks for maths, etc.

I hope it goes well.