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Amazing Birthday
Cards is an activity in which students respond "yes" or "no" to five numbered cards and the teacher uses mathematical patterns to determine the birthdays of these students
based on their responses. Students discover the mathematical pattern that enables the teacher
to identify the birthdays and they come to understand that this activity is based upon the base 2 number system.
Amazing Birthday Cards never ceases to amaze the students!
Amazing Birthday Cards Activity Preview Pages (6 of 14)
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Lesson Description:
Amazing Birthday Cards is an activity in which
students respond "yes" or "no" to five numbered cards and the teacher uses mathematical patterns to determine the birthdays
of these students based on their responses. Students discover the mathematical pattern that enables the teacher to identify
the birthdays and they come to understand that this activity is based upon the base 2 number system. Comparing our base
10 number system to the base 2 number system also deepens student understanding of our system. Amazing Birthday Cards
is an activity that never ceases to amaze the students!
Math Content:
Number Patterns, Logic, Base 2 Number System, Other Number Systems
Time Required: 1
Class Period (or small parts of several class periods)
Amazing Birthday Cards includes:
- 1 Amazing Birthday Cards Teacher Notes page
- 5 Amazing Birthday Cards Numbered Activity Cards
- 1 Amazing Birthday Cards Number Pattern worksheet
- 2 Amazing Birthday Cards Mathematics worksheets
- 2 Amazing Birthday Cards Mathematics worksheet Answer Keys
- 2 Amazing Birthday Cards Teacher Tips pages
- 1 Amazing Birthday Cards Cover Sheet
14 pages in all!
Materials Needed:
None
Suggested Grade Level:
5th-8th
Teacher Testimonial: Amazing Birthday Cards is an activity I use every year. The students enjoy participating in this
activity and are amazed that by simply saying "yes" or "no" in response to the five cards that I hold up, I can tell
them their birthdays. I only take a few of the many volunteers I have each day, thereby building up the suspense before
I reveal the mathematical basis for my success in the activity. (Some students think that I actually take my class rosters
home and memorize 200+ birthdays each year! As if I had time for that!) The Birthday Cards Number Pattern worksheet
allows the students to generate the number pattern themselves and try it out on their friends and family.
Enjoy your lesson!!
Mark P. Tully
Teacher Feedback:
"My students have been working in base
2, and were so enthusiastic about the Amazing Birthday Cards activity! They loved the "trick", but they were more excited
that they understood how it works. Thanks for sharing your great lessons. I'm excited to use the other lessons
I purchased."
-Patti Woschitz, Dacula Elementary, Dacula,
GA
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