I’m using this with my son who will be five in September: http://www.amazon.com/Teach-Your-Child-Read-Lessons/dp/0671631985
I’m very happy with it and I can’t wait to use it with my daughter. My son already knows the phonics sounds and consonants vs. vowels so this flows really well. These quick 10 minute lessons are perfect for that age group. As for math, science, etc., there are many great apps (a lot of them free if you don’t mind ads) for those pre-k subjects. An iPad investment is something to consider. That’s what we’re doing with our kids anyway. Just my 2¢!
Thanks I will have a look at it.