Build Number Sense - What is Ten-ness? When kids develop the concept of ten-ness, they have a deeper understanding of number relationships. They are also better equipped to perform mental math. Making 10 is a powerful strategy to help develop this math skill. Find out more in this blog post. http://mrelementarymath.blogspot.com/2015/12/the-power-of-making-tens.html Don't forget to grab the FREE addition game Find the Ten Within. Check out other great ideas in the I Teach 1st Grade link up.