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Beginner Modeling Exercises
The goal of this paper written as part of the MIT Systems Dynamics in Education Project is to teach the reader how to distinguish between stocks and flows. A stock is an accumulation that is changed over time by inflows and outflows. The reader will gain intuition about stocks and flow through and extensive list of different examples and will practice modeling simple systems with constant flows. STELLA modeling examples include, but are not restricted to, skunks populations, landfills, a bank account and nuclear weapons.
Intended for grade levels:
  • Middle (6-8)
  • High (9-12)
  • College (13-14)
  • College (15-16)
Type of resource:
  • For the classroom:
    • Guide for instructor
  • Text:
    • Journal article
  • Biology
  • Educational theory and practice
  • Environmental science
  • Physics
Technical requirements:
Adobe Acrobat reader
Cost / Copyright:
No cost
Copyright 2000 Massachusetts Institute of Technology
DLESE Catalog ID: SERC-STARTINGPOINT-000-000-000-060
Resource contact / Creator / Publisher:
Author: Jay W. Forrester
MIT System Dynamics in Education Project

Contributor: Leslie A. Martin
MIT System Dynamics in Education Project