For more than two decades, Castro Valley Sanitary District (CVSan) has proudly offered its 4Rs Field Trip for 3rd graders. Students arrive at CVSan offices where they learn about the 4Rs (Reduce, Reuse, Recycle, and Rot), how to properly sort solid waste, as well as make their own recycled paper! This fun-filled 2-hour field trip is offered free to Castro Valley schools. Free bus transportation may be coordinated with all schools.


Click here to register and see below for links to the pre and post field trip lessons as well as a class roster sheet. This link will redirect you to the RegOnline registration interface.  

Lesson Plans

CVSan Content Standards Correlations

CVSan Pre/Post Field Trip Lesson Plans and Activities

Lesson 1: Pre- Field Trip: What are Natural Resources?

Lesson 2: Pre- Field Trip: People Use Natural Resources

Lesson 3: Post- Field Trip: Reducing the Amount of Plastic That Goes to a Landfill

Trash and Resource Facts

Class Roster Sheet for use on the day of the field trip.

Other CVSan School Programs:

Green Ribbon Schools Program

Schools Food Scrap Recycling Program

School Waste Audit Program