For basic lesson preparation, refer to the materials list and Teaching Notes in each lesson. The following are materials that may take more time or organizing.
One to two days before the start of Lesson 1: Obtain 15 small, previously potted and grown plants of the same variety (suggested varieties: cilantro, sweet potato vine). Divide plants into sets of three (one set for every four or five students) and, using a marker and labels, label each plant in the set as 1, 2, or 3. Refer to the Directions for Live Plants Observation Setup below.
- Lesson 2: Plant 1 (see Directions for Live Plants Observation Setup below for care instructions)
- Lesson 3: Plant 1 and Plant 2 (see Directions for Live Plants Observation Setup below for care instructions)
- Lesson 4: Plant 1 and Plant 3 (see Directions for Live Plants Observation Setup below for care instructions)
Directions for Live Plants Observation Setup
Purpose:
In order to support students' developing understanding of the criteria that make a living thing living and to provide illuminating examples of each of the criteria, students observe a set of three plants over the course of the unit with a small group. During Lessons 2-4, groups observe one or two plants from the set of three. Before these observations, the teacher provides varying levels of care to each plant. The effects of this varying care highlight what happens to a living thing when one of its needs is not met.
If it is not possible to purchase enough plants for each small group to observe their own set, consider conducting this activity with one set of three plants for the entire class to view. Follow procedures outlined for the observation of plants in Lessons 2-4, making adjustments to ensure that all students are able to view the plants closely.
Materials:
- Approximately 15 small plants of the same variety (suggested varieties: cilantro, sweet potato vine). Plants should be purchased already potted, with growth previously started.
- Sealable bag (gallon-sized; one per set of plants)
- Marker (one; used by the teacher to label plants)
- Label (white; 2x2 inches; one per plant)
- Water (used by the teacher to water plants)
SETUP PROCEDURE:
- One to two days before the start of Lesson 1: Obtain plants; divide plants into sets of three (one set for every four or five students).
- Using the marker and labels, label each plant in the set as 1, 2, or 3.
- Use the following care guide for each of the plants for Lessons 2-4. (Note: The care guide should be followed before start of the specified lesson.)
PRIOR TO LESSON 2
Plant 1
- Place in a well-lit, well-ventilated area.
- Provide enough water to moisten soil.
Plant 2
- Place in a dark area such as a closet or cupboard.
- DO NOT WATER.
Plant 3
- Provide enough water to saturate soil.
- Place into a sealed, airtight bag.
- Remove as much air from bag as possible.
- Place in a well-lit area.
PRIOR TO LESSON 3
Plant 1
- Keep in a well-lit, well-ventilated area.
- Provide enough water to moisten soil.
Plant 2
- Keep in a dark area such as a closet or cupboard.
- DO NOT WATER.
Plant 3
- Keep in a sealed bag in a well-lit area.
- If plant begins to look dry, water lightly and reseal bag, ensuring that as much air as possible is removed.
PRIOR TO LESSON 4
Plant 1
- Keep in a well-lit, well-ventilated area.
- Provide enough water to moisten soil.
Plant 2
- Plant is no longer needed.
Plant 3
- Keep in a sealed bag in a well-lit area.
- If plant begins to look dry, water lightly and reseal bag, ensuring that as much air as possible is removed.
PRIOR TO LESSON 5
Plant 1
- Keep in a well-lit, well-ventilated area.
- Provide enough water to moisten soil.
Plant 2
- Plant is no longer needed.
Plant 3
- Plant is no longer needed.