1. Juan Daniel’s Futbol Frog Exploring a Frog’s Membrane
By: Katherine Norvell
Katelyn Gaskins

2. About Our Book Juan Daniel is a young soccer player
Finds a lucky frog in the hot, dry environment at soccer game
Worries about the life expectancy of frog
Begins to care for animal
Creates a membrane
Frees frog back in natural environment

3. Overview Frog skin and human skin is a membrane
Membranes protect harmful things from getting inside the body
Allow oxygen and water to get in

4. Overview, Continued Frogs drink through this membrane
Absorb water through their skin
Some frogs have anti-microbial properties
Skin can fight bacteria and viruses

5. Overview Continued
Membrane must allow water to drip just enough to keep the frog moist
Showered vs. Flooded

6. Try It!
Design a Model Membrane
Resembled a frog’s skin

7. Materials Clear Plastic Wrap Small Plastic Bowl Piece of Wire Mesh
Rubber bands
Tape
Scissors
Sponges
Cotton Balls
Duct Tape
Small Plastic Cup

11. Engineering Design
The Try It! Activity was very interesting for an early elementary classroom.
Could be done whole group not small groups

12. Try It!
Membrane Modeling would allow older elementary students to use more of the Engineering Design independently
Instructions difficult to follow
Spanish language introduced

13. The Engineering Process
Ask: How can a frog’s membrane stay moist?
Imagine: How can we create a frog membrane using household items?
Plan: Brainstorm a list of items needed to create a successful frog membrane
Create: Create experiment in back
Improve:
Substitute Cotton Balls in bottom
Add a sponge in the clear plastic cup
Rewrite instructions to clarify misconceptions