We started a new math curriculum last winter called
Right Start. I chose it because I liked the fact that there a lot of manipulatives and I liked the philosophy, which you can read about
here.
It has worked very well for us, but there are definitely concepts that seem very difficult for C. I don't know why this is, but when we run into trouble I try to find a new way to approach it. For example, she could not figure out the difference between nickes and dimes and how much they are worth, and the concept of adding them together was complete gibberish to her. So I decided to make it a little fun for her and I gathered together empty food boxes and made a little store for her!

C. was very excited about it, she loved having the shopping bag and making her selections at the "store."

Adding up her purchases on the abacus.

Counting out the correct amount with dimes, nickels, and pennies!

Her turn to be the cashier! Of course, she prettied it up with some plants and candles.

Success! I think this really helped her to understand how to add the different coins. I love having the freedom to leave things when they don't work and come back to it a different way on a different day.