Science, technology, engineering, andmathematics (STEM) are vital to the economic and socialprosperity of countries. Yet, women and girls continue to beunderrepresented in STEM careers, although there is widevariation among countries and across STEM fields. Beyondincome disadvantages for women because they have less accessto STEM careers, the gender gap in STEM is also a missedopportunity for economies and an inefficient allocation oflabor and talent. This report explores the participation ofwomen and girls relative to men and boys in STEM-relatededucation and employment through a global, comprehensivereview of the evidence. The report focuses on both thedrivers and the solutions related to the participation ofwomen and girls in STEM.