Combinations, Permutations, and Counting Task Cards This activity reinforces the concepts of permutations, combinations, and counting principles. The concepts
Factorials are used in determining the numbers of combinations and permutations and in finding probability. Let me introduce you to the book Anno's Mysterious Multiplying Jar by Masaichir and Mitsumasa Anno. It is a story about one jar and what is inside it. Even if children do not understand the concept being taught, they will certainly appreciate the detailed colored drawings and imaginative story! Read how factorials are used in this book.