If you wanted to follow Doman's method (How to Teach Your Baby to Read, Glenn Doman), you would show each lesson 2 or 3 times daily. The Little Reader lessons already have quite a bit of repetition built into them so you should follow your childs lead, if your child is still interested in the same lesson after once, show it twice, if still interested show it three times (at different times of the day). But always stop before your child wants to stop. If you complete a lesson and your child asks for more say "sure, we can see more after lunch". And always stop WAY before your child gets bored. You want learning to be fun and playful. If at anytime teaching your child becomes a burden or unfun for either you or your child you should stop and do something else. Im in your same position as far as saving money for the software. I started showing my son hand made flash cards at 9 months, then moved on to memoflix (
www.memoflix.com) and showed him 3 set of online flash cards there 3 times a day for 5 days until we'd covered all the memoflix, now Im on to the powerpoint slideshows here. I still mix in my own powerpoint flashcards when I see he's interested in a particular subject. I highly recommend reading Glenn Doman's books you can buy them from the institute for the achievement of human potential (
http://www.iahp.org/Books.344.0.html)
Hope this helps!
Tammy
www.smilesfromhome.blogspot.com