Hand a six-year-old a tall rod of ten cubes and three loose cubes, and they will often count the rod one cube at a time before they trust it is ten. That trust is the goal here. This 1st grade base ten blocks to 20 worksheet works with pictures of those blocks: a long rod stands for one ten, and each small cube for one. In the top part, nine models wait for your child to write how many tens and how many ones they show; the first one is done as an example. In the bottom part, six questions offer two models, and your child picks the one that matches. Some models have no rod at all. A second page gives the answer key.