Give each student an index card, keeping the cards as diverse as possible in each group. Give an example if necessary to get them going. If the first student is rain, she may choose soil because rain keeps soil moist so plants can grow. The student could also say fish because rain affects water levels in streams ad lakes. Encourage students to express reasons for the connection.
Any connection is acceptable.
Finding indirect connections is encouraged. The process continues until all components are included in the web. Make sure the yarn is taut, ask students to be very still. Have the student holding the original end of the yarn gently begin tugging. Keep reminding everyone that when they feel a tug, they should gently tug in response.