The word "critical" in the title of this collection has three meanings, all of which are relevant. One meaning, as applied to a situation or problem, is "at a p

This book is open access under a CC BY 4.0 license. The book presents the Proceedings of the 13th International Congress on Mathematical Education (ICME-13) and

Lamberti (history, Middlebury College) examines the culture wars that took place in 1920s and 1930s Germany over issues in education. She describes how innovati