Each group needs:

• Semipermeable Membranes Pre/Post-Quiz, two per student
• Semipermeable Membranes Worksheet, one per student
• Semipermeable Membranes Project Rubric, one per group
• 3 materials from which to build and refine its semipermeable membrane prototype/model, groups choose from teacher-provided supplies, such as those suggested below
• items for testing permeability: ring stand, pipette 3-4 clothes pins
• timer, to count seconds

To share with the entire class:

• an assortment of possible prototype-building materials, from which each group chooses three; suggested materials: sugar cubes, newspaper, copy paper, magazine paper, cardboard, paper plates, paper towel squares, cotton fabric squares (~1-foot square); consider sourcing many items from recycling bins (paper, newspaper, magazine paper, cardboard); consider getting fabric scraps donated from quilters, sewers, parents, or buy from fabric store bargain bin
• assorted tools for construction/fabrication: scissors, craft knives, tape, cotton string (2-foot lengths)
• items for testing permeability: tap water, liquid food coloring