You can contact LEARNZ, part of CORE Education, at:
PO Box 13 678,
Although our classes were Year 2-3 we felt the audioconference answers were delivered at a perfect level for our students. There were plenty of resources we could use and adapt to suit our learners. I had two special needs students who thoroughly enjoyed various aspects of the programme.
We are starting science fair and this was a good introduction. Wide range of students who all enjoyed it and worked at own level.
Different reading abilities of background information. I actually used these for teaching reading groups. They were fantastic reading material with challenging information.