Each group needs:

• 6 pots or cups with drainage holes, such as seed-starting plastic pots
• container or tray to catch draining water from the seed starting pots
• 60 seeds, such as lettuce or other plant that sprouts within a week
• 1 graduated container, to measure the volume of the seed starting pots
• bucket for mixing soil and “organic waste,” big enough to hold enough soil and organic waste to fill 3 of the seed-starting pots
• thermometer
• Soil Biosolarization Activity Handout, Pre-Activity Quiz and Post-Activity Quiz, one each per student

To share with the entire class:

• potting soil or compost, enough for each group to fill its 6 seed-starting pots
• “organic waste,” such as a solid food source that is easy to mix with soil, like oatmeal, flour or cornstarch
• transparent plastic wrap
• water