This Smartboard activity allows your students to practice representing numbers with tens and ones blocks. Just touch rods or units and drag into the columns. This activity is enhanced if you allow your students to use base ten manipulatives on their desk. For your convenience, I have included a link to download a free tens and ones mat for each student. In case you don't have class sets of Base Ten manipulatives, I have included a link to an online printable that you can have your students color and cut out to use on the workmats. Also includes a link to a fun online place value game for more practice.