This card sort activity has students categorize 24 statements about the Real Number System as Always True, Sometimes True, and Never True. The statements relate to the different types of numbers in the Real Number System: Real, Irrational, Rational, Integer, Whole, and Natural. 8.2A Extend previous knowledge of sets and subsets using a visual representation to describe relationships between sets of real numbers
For those who need something to touch and move around, this hands-on real number model works well as it gives the students something to see as well as to manipulate. This 6 page handout contains complete and easy directions on how to construct the model which shows the relationship between real numbers, rational and irrational numbers, integers, whole numbers and natural or counting numbers.