Great fun finding out where the hiding places were.  

  I got it down to a fine art with Stinky collecting all the rainbow coins, but then realised I had no bonuses! 
 
 
Change of strategy.  Success!! 
 
 
PS:  You have my sympathy, educating Audra at home.  I did this with my son for 2 years (with good results) and with my daughter for 6 months (no hope - she went to another school!).  It's a slog, but I firmly believe in home school if it's right for the kid.