Try http://www.cimt.plymouth.ac.uk/projects ... /book8.htm
When you buy the books - there is an online order form or you can call them - you get a password to access the answers and extra activities.
Also, when you buy any type of workbooks (doesn't have to be the cimt ones), make sure
child is not just doing the work daily, but that
you mark the work immediately so he gets feedback and you know how he is doing,
he does the corrections and
if you mark the work, you can very quickly pick out the weak areas and maybe you can go over certain concepts again, just to make sure he understands where he went wrong and what he should and should not be doing.
** sorry to sound patronising re marking and corrections. I am guilty of this myself and think if D has done the work, she should improve. It doesn't work this way (I have found this out the hard way).
Hope this helps.