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Moldy Jell-O

In the lab, Moldy Jell-O, students design experiments to determine how substrate and environmental conditions influence growth of common molds. Students carry out their experiments, analyze and interpret their evidence, and prepare a report.

Download Student Handout: PDF format or Word format

Download Teacher Preparation Notes: PDF format or Word format

We invite comments on this Hands-On Activity and the accompanying Teacher Preparation Notes, including suggestions for other teachers who are planning to use the activity, useful preparatory or follow-up activities, additional resources or any questions you have related to the activity, or a brief description of any problem you might have encountered. If you have a relevant Word document you would like to have posted on this comments page, such as a version of the protocol you have used in your classroom, or if you would prefer to send your comments or questions in a private message, please write Ingrid Waldron at

See also a complete list of activities:
Hands-on Activities for Teaching Biology to High School and Middle School Students


Serendip Visitor's picture

Would this lab still work if

Would this lab still work if i were to use store bougth jell-o

Ingrid Waldron's picture


Please see the Teacher Preparation Notes for further clarification.

Ingrid Waldron

Monica's picture



I am teaching a class in Malaysia and do not know if I can get Jello. Will agar agar work? It is their version of jello, yet denser. Just thought I would ask, before I try it out myself. :)


iwaldron's picture

Agar agar versus Jell-O

I don't know the answer to your question, but I believe that as long as agar agar contains protein, sugar and water, the results should be the same.  Please let us know what you find out.

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