Book Review: Foundations for the next era of elementary mathematics teacher education. Yiping Li, Roger E. Howe, W. James Lewis, and James J. Madden (Eds.) (2021) Developing mathematical proficiency for elementary instruction: Springer International Publishing https://www.springer.com/gp/book/9783030689551 xvii +298 pages. Hardcover: ISBN 978-3-030-68955-1 $149.99US. eBook: ISBN 97-3-030-6956-8 $109.99US - Corven, Julien (Educational Studies in Mathematics, 2022)