Hello,
It seems that this a great series and I wanted to ask those who have used it, do you have to do them in the order suggested? Does one lead on from another?
I ask because DS has not done any as yet but is suddenly showing an interest in algebra. Could I start with Pre-algebra and biology or should I stick with the first fractions book? He can do basic fractions but does not seem as excited in this area.
Thank you in advance for your feedback