Catapult Castles and Number Lines

Second graders work really hard on learning how to add and subtract larger numbers.  The focus in second grade is using place value to do addition and subtraction.  This way by the time they learn the traditional algorithm they will know why it works and have a deeper understanding of place value.

Ict games comes to the rescue again!  Although this time it is a castle that needs rescuing.  In this game students see how many hops they need to get to a friendly number and solve the problem.  If they make the correct hops, the cannon ball hits the castle.  They keep going until they knock out the castle.  Sounds a little mean but the castle always gets rebuilt in the end.

I