I've been doing some research on lattice multiplication... I thought it was a cool way of doing multiplication, but I was trying to find more information about it... I didn't want to teach my kids something that I wasn't informed about. Well, while looking through Youtube I came across this video http://youtube.com/watch?v=Tr1qee-bTZI&feature=related I'm a new teacher and I want to do what is best for the kids.. Our school uses Scott Foresman Mathematics and we have TERC as supplemental material. I've never used TERC so I brought home some stuff to look over during the summer. I was excited about finding lattice multiplication because double digit multiplication is a tough concept for a lot of kids. Well, after viewing the video above I'm not so sure anymore. I think that teaching the traditional algorithm is the only way to go even if I have to spend more time having the kids practice. I'm just curious about other teacher's views on this.. Would it still be ok to teach the lattice method after the kids have mastered the traditional algorithm?