Grandmother Fish

Grandmother Fish Grandmother Fish (the first book to teach evolution to preschoolers), Clades games, and more! Mark’s School of Texas

Grandmother Fish is “groundbreaking... Highly recommended for homes, schools, and libraries.” —School Library Journal

Clades “has children asking deeper questions than usually ever get asked in a formal classroom setting” —John Mead, Eugene McDermott Master Teacher of Science, St.

For over 10 years, people have asked my artist, Karen Lewis, & me about getting posters of the evolutionary tree of life...
08/24/2026

For over 10 years, people have asked my artist, Karen Lewis, & me about getting posters of the evolutionary tree of life in Grandmother Fish. Finally, it's here! Kids love poring over this tree and seeing how animals are related. Great for classrooms. Also, mugs and other well loved images from Grandmother Fish!

I want kids to show up at kindergarten knowing things that would have blown Aristotle’s mind, and this poster is part of that project.

A poster version of the evolutionary tree of life found in the children's book Grandmother Fish: A Child's First Book of Evolution (Macmillan 2016). All life is related! Book by Jonathan Tweet, illustrated by Karen Lewis. See www.grandmotherfish.com. • Millions of unique designs by independent art...

06/23/2026

#1, June 2026.

Here in Seattle, young crows are out there begging for food. This app shows you how to identify their distinctive cry an...
06/15/2026

Here in Seattle, young crows are out there begging for food. This app shows you how to identify their distinctive cry and spot crow families in the field. Kids love finding out about animal families in their neighborhoods. Free & ad-free.

Crow Scientist is a free app (also ad-free) available in Google Play and Apple App stores. Crow Scientist is also now available online as a web app. The app asks young students to observe crows the way a scientist might and is designed to support simple science projects. What behaviors do they exhib...

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