After 2 weeks when I despaired that everything we learned had been forgotten... and Ben was struggling with the basics... he made a huge breakthrough today and we are back on track. And addition with renaming was magically mastered overnight. It is the mystery of learning -- sometimes a great leap backwards precedes a step forward.
And somehow he remembered place value, many math facts, the tricks for adding 8 and 9, too.
It really makes you wonder how the brain works... Where was this information last week? Where does it go when it goes away? What is the brain doing while it is adding new skills?