Weeds & Weevils Unit - Middle School

Do life cycles really matter?  How do species interactions affect land management decisions?  In this middle school unit, explore the science behind invasive species management through hands-on investigation of plant and insect life cycles.

Hands-on activities meet Colorado Life Science and Data Analysis, Statistics, and Probability standards.

The toadflax lessons can be completed year-round since stems are always available for dissection.  In the toadflax lessons, students investigate the characteristics of invasive plants.  Students explore lifecycles and interactions between organisms to learn how biological control agents (in this case insects) can be used to reduce invasive plant populations.  Students apply their knowledge to a real-world situation in the management game.  The knapweed lessons are best used in late summer through early autumn, as mature seed heads for the dissections are only available at these times.  The goal of this part of the unit is to teach students about biological controls.  Development of these lessons was supported by funding from the USDA.

Download:

• Introduction to unit (ppt)

• Pre-assessment test (doc)

• Toadflax lessons (pdf)

• Life cycle cards (pdf)

• Knapweed lessons (pdf)

• Scientist in Action (pdf)

• Virtual field trip to CU Mountain Research Station: Thistles and weevils (ppt)

Related Research

• Biogeochemistry Laboratory I

Related People

• Tim Seastedt