Illinois State University
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Project EDDIE: Lake Ice Phenology Module

Project Summary

Lakes are changing worldwide due to altered climate. Many lakes that were historically frozen in the winter are now experiencing fewer days of ice cover and earlier ice-off dates. In this module, students will explore long-term ice-off datasets from several lakes and use linear regression to make predictions about ice-off dates in the future. Project EDDIE modules are designed with an A-B-C structure to make them flexible and adaptable to a range of student levels and course structures.


We recognize that many users might wish to modify this activity. Please include text in each file that you use that acknowledges the original development of this module. We suggest this text, which is currently included in each file:

"This module was initially developed by Carey, C.C., J.L. Klug, and D.C. Richardson. 1 April 2015. Project EDDIE: Lake Ice Phenology. Project EDDIE Module 1, Version 1. Module development was supported by NSF DEB 1245707."


Please cite this module as: "Carey, C.C., J.L. Klug, and D.C. Richardson. 1 April 2015. Project EDDIE: Lake Ice Phenology. Project EDDIE Module 1, Version 1."

Class Time

This entire module can be completed in one 2-3 hour lab period or two 50 minute lecture periods for introductory or intermediate level students. Activities A and B could be completed with upper level students in one 50-60 minute lecture period. Students will need 1-2 hours outside of class to prepare for the exercise and complete the homework activities.

Class Context

This module has been used in a non-majors Environmental Science course (Part A) and several Freshwater Ecology and limnology courses (Parts A and B for lower-level courses; Parts A, B, and C for upper-level courses). We anticipate the module could be used in a variety of courses. Module materials can be tailored to increase or decrease the background information depending on students' quantitative skills.


  • Instructor's Manual [docx]
  • Instructor's PowerPoint [pptx]
  • Student Handout [docx]
  • Student Datasets [xls]
  • Instructor's Homework Part C Answer Key [xlsx]

Project Support

Project EDDIE is supported by funding from NSF DEB 1245707. Project EDDIE is sponsored by the National Association for Geoscience Teachers.

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2014-03-28T13:39:36.547-05:00 2014