This is what people are saying about Yucky!.

Dr. Catlin Tucker

Dr. Tucker is an education expert, bestselling author, and international speaker with 24 years of experience in education.
"I wish I had this book on my shelf when my kids were younger and struggling in math! It’s such a beautiful reminder that math is more than numbers or a set of steps to follow. Math is about finding patterns, being creative and staying curious. Mr. X is a fabulous example of how a great teacher can change hearts and minds."

Margie Pearse

Margie is a Math Curriculum Specialist & Coauthor of Teaching Numeracy: Passing the Mathematics Test and Math by the Book (Grade 5).
"All children need to know that math is so much more than simply doing calculations. And all children need to discover they have what it takes to be good a math: they are pattern seekers, they are curious, they love to explore and connect. Yucky will give teachers a way to explore all that."

David Poras

David is the Director of Product at Mathigon. He has taught middle school math for more than 20 years. 
"Yucky! is a wonderfully written and illustrated book that helps show readers that math is so much more than just working with numbers. Join Lilly on her journey as she learns that math is about looking for patterns, being creative, and staying curious while exploring fractals and optical illusions."

Dr. Vicki  Sterling

Dr. Sterling is a retired professor. She taught teachers how to teach Reading in the College of Education at Dakota State University for 35 years. 
"A student struggling with math has maybe heard the comment about another family member who struggled with math.  The comment was made to help the student feel like they are not the only person with math anxiety.  The question is, does it make the student feel better or think there is no hope.  In Dr. Kevin Smith’s book “Yucky!,” Lilly’s teacher helps her see the connection between what she is good at doing and math.  My hope is that Dr. Smith continues with the series so students, parents, and teachers can see math connections with science, music, cooking, etc. providing unlimited everyday applications."