Some situations require comparing sets to answer the questions “how many more?” or “how many fewer?”. Cultivating an understanding of comparison and ordering helps children build the understanding they need to think about a set in relationship to other sets and begin to make comparisons between numbers. Familiarity with this idea prepares children to address questions they will encounter in first and second grade, such as “If Ilan has ten crackers and Juanita has 8, how many more does Ilan have?
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In this planning conversation, a teacher and coach discuss some of their ideas and concerns about a forthcoming lesson. With a coach, she discusses some of her ideas and concerns about the forthcoming lesson.
Have some Halloween fun with the witch’s tale Room on the Broom. In this lively story by Julia Donaldson and Axel Scheffler, a witch makes room for her animal friends to ride on her broomstick… until there’s one too many animals, and the broom snaps in two. The central question of this book – Is there room on the broom for me? – is a mathematical one.
A child compares two small sets of wooden cubes.
A child estimates the number of cubes in a collection.
In this video, students brainstorm ways to sort their shoes. Later, they graphically organize the data from the sets they created.
A child plays “hide-and-seek” with a group of bears to determine how many are missing from a larger group.
A kindergarten student uses blocks to make groups that are larger than, smaller than, and equal to the instructor’s set.
A child computes how many are missing from a larger group.
Olivia Trevino’s preschool class at Marsh Elementary School took advantage of all the winter weather to explore picture books about mittens. The Mitten by Jim Aylesworth and The Mitten by Alvin Tresselt are two delightful versions of the Scandinavian folk tale about a group of animals that try to squeeze into a boy’s lost mitten.