"Rumors" Teacher SupportRumors Archived PoW  Student Version Rumors is no longer the current ESCOT Problem of the Week. The student version allows teachers to use the problem with their students without giving the students access to the archived answers. Teachers can use the link to the archived problem to get ideas of student thinking. Rumors asks students to compare the difference in rates of growth of rumors in a population between a controlled situation and a reallife situation. Given the controlled situation graph, the students are asked to predict how the reallife situation will look in a graph. This ESCOT PoW could be used to introduce and/or reinforce concepts of linear, step, and exponential functions. Often students don't understand the importance that the constant of time plays in a linear function. This exercise could also be used to compare controlled results vs. reallife results. If you have something to share with us as you use any of the links or suggestions on this page (something you tried and changed or a new idea), we would love to hear from you. Please email us. Alignment to the NCTM Standards  Grades 68
 understand patterns, relations, and functions Geometry  use visualization, spatial reasoning, and geometric modeling to solve problems Problem Solving  solve problems that arise in mathematics and in other contexts Communication  communicate mathematical thinking coherently and clearly to peers, teachers, and others  use the language of mathematics to express mathematical ideas precisely Connections  recognize and apply mathematics in contexts outside of mathematics
 Interpreting Graphs  The Hot Tub by Cynthia Lanius  Points in the plane: Points in the xy plane by ExploreMath.com [Shockwave is required] PostActivity  Lines/Linear Equations by ExploreMath.com [Shockwave is required]  Exponentials/logarithms: Exponential Functions by ExploreMath.com [Shockwave is required]  Introduction to Linear Functions by The Shodor Education Foundation [top] Related Lessons Online:
 Functions Made Easy by Eldred Marshall Lessons for Students  Graphing  Coordinate Graphing by Laurie Dunbar  Graphing the Weather by Ric Cooley  In the Dark with an Elephant  ESCOT  The Moving Man Project  Understanding Distance, Speed, and Time  NCTM Electronic Example [top] Resources to use with students:
 All About Functions  Domain and Range  Function Machine  Mapping Functions in the Real World  Natural Domain of a Function  Range and Domain of a Graph Vocabulary  axis  domain  exponential  function  graph  line  linear function  range  step function [top] Other Resources
 "Blowing in the Wind" Wind Chill: An Exponential Function by Robin A. Ward and Frank Pullano  Demonstrating An Epidemic by M. Beth Powel  Graphing Exponential Functions  a Claris Works tutorial  National Center for Infectious Diseases  Population Growth Summary  StarLogo Sample Project  Epidemic
