Math for 2s and 3s: The impact of parent-child math activities on parents’ beliefs and behaviors and young children's math skill development

•Parents were texted fun math activities to do with their 2- and 3-year-old children•The study used a randomized design to evaluate the program's effectiveness•The program increased parents’ belief that math is important for young children•Program parents reported and displayed greater engagement of children in math•The program increased children's ability to subitize, a foundational math skill