From Pre-K through 6th Grade

Presenter: Fran Endicott Armstrong, Ph.D.
Address: Mathematics Department
St. Louis Community College/Meramec
11333 Big Bend Boulevard
St. Louis, MO 63122-5799
Contact: Phone: (314) 984-7769
FAX: (314) 984-7256

Developmentally appropriate, meaningful activities involving triangular numbers will be featured. You will learn what triangular numbers are and why they are called that and how you can provide opportunities for your students to make observations about the sequence of triangular numbers and generate a formula for the nth triangular number and how they might pop up in applications and problems.

1,2,3,4,5 Stickers
1,2,3,4,5,6,7,8,9,10 Stickers
Triangular Arrays with Pegboards or Cuisenaire Rods ®
Find the Sum of the First 100 Natural Numbers
Triangular Number Book
Making a Table of Triangular Numbers
Problems Involving Triangular Numbers
Applications Involving Triangular Numbers


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St. Louis Community College at Meramec
11333 Big Bend Boulevard, St. Louis, MO  63122-5799
Phone: 314-984-7500 | TDD: 314-984-7704
An Equal Opportunity/Affirmative Action Institution
Accommodations Available to Persons with Disabilities
Modified 12/1/99