Read-alouds of picturebook biographies offer children engaging windows into the lives and work of famous (and sometimes not-so-famous) mathematicians to observe and discuss their ways of learning and doing mathematics--their mathematical practices. The Standards for Mathematical Practice (SMPs), although generally embodied in the work of successful mathematicians throughout the ages, were only recently identified and prescribed for US mathematics curricula. The authors provide a rationale for using the context of story to introduce the SMPs to elementary students and share picturebook Read-Aloud Lesson Ideas as samples for inviting discussions about selected Standards. Three figures list additional biographies in the categories of Computer Science and Coding, Space Exploration, and Other Related Mathematics Fields and provide an analysis of two selected SMPs for each book.