Below are a few short exercises that you may complete after reading through this website. There are three options - A, B, and C - that are all designed to enhance your understanding of the material presented, and are separated so that teachers may choose the assignment(s) best suited to their class.

Assignment A: Short Answer Questions

This assignment involves a few brief questions about the content on this website.

Assignment B: Graphing Long-Term Data

This assignment lets students graph the long-term warbler data using Excel. For this you will need to download a pdf file with the questions, an Excel file with the data, and a pdf file with instructions on how to make graphs in Excel.

Assignment C: Interactive Population Simulation Model

This assignment lets students simulate what would happen to the number of Black-throated Blue Warblers on the study plot with changes in food, predators, and the strength of density-dependence. First download the instructions and questions and then proceed to the simulations page.

Finally, teachers can click here for answer keys, a more advanced assignment, and information on National Science Standards (contact the Hubbard Brook Research Foundation for password access,


Extra Information


If you are interested in the material presented in this learning module, you can find extra information by clicking on the following items:


Scientific Papers


Contact Information


Learning module developed by K. Langin, H. Sofaer and S. Sillett for the Hubbard Brook Research Foundation (2009).