I love math and was a math teacher for many years, so it was fun for me to write several math books, including 'Fraction Fun,' 'Calculator Riddles,' and 'Shape Up!' 'Fun with Triangles and Other Polygons.'

I write about people I think are interesting, and then I discuss it with my editor, and she decides if she thinks it will be interesting to children as well. If I have no great interest in the subject, I find the work to be terribly boring. And if I find the person interesting, I love the research part and, by extension, the writing as well.

I love Tinkle, it's really the most fun I've had in years.

The math is simple. I don't get why I'm doing it, but it's calculator math.

I love oddballs and nerdiness, and it's a fun world to write in.

I write both fiction and nonfiction. I begin my fiction with the main character. The story comes later.