Students research the historical background of the potato. In this potato research lesson plan, students cut out the important dates in potato history. Students make a timeline for the events.

Seventh graders identify how to use sterile techniques when identifying plant pathogens.  For this plant diseases lesson students complete a lab activity in which they see how plant diseases are identified and classified.

Seventh graders examine the concept of sterile techniques. They realize that plant diseases can be identified and classified in various way. Students identify some of the diseases that attack the garden plants.