Cuisenaire rod sums

In Algebra, numbers are replaced by letters. We made a beginning with this using the Cuisenaire rods.

Here they all are with their letter names. We weren't sure what "t" stands for, so we decided it was "tree" (trunk) colour!

Some of us show our sums in this film:

Here we are working on our Cuisenaire sums, making them first with the rods, then recording them on paper:

More photos here:

Thanks to Don Steward for the inspiration!