Number necklaces are a simple yet engaging way to practice comparing numbers with your students. Katie from Once Upon a Teaching Blog made these necklaces for her 4th grade students using index cards, a hole punch, and string. She wrote 5 and six digit numbers on their necklace cards. For some physical activity, she calls two students up at a time and has the rest of the class use “alligator signs” to show which number is greater. She also uses the necklaces to practice ordering numbers, for which she brings four students up to the front of the classroom and has a fifth student arrange them from least to greatest. See how many more uses you can find for these number necklaces in your own classroom.