I was sure I had packed cuisinaire rods for this year's home schooling adventures; alas, when we needed them for this morning's lesson on the length model of fractions, there were none to be found!
Undeterred, I had the boys search the NLVM site for some online rods. Nothing!
Desperate to stick to the lesson, we searched online for another interactive cuisinaire rod, and stumbled across nrich.maths.org -- and they had virtual cuisinare rods! FREE!
Relieved, I set the boys to work on an exploration activity (it was the first time they had seen cuisinaire rods!!!) followed by a series of length model fraction problems from our Smart Bansho project last year.