Once you find something relevant, you can use the Subject terms to find other items. Examples of some useful ones include:
Helping children learn mathematics by 
Elementary and middle school mathematics: Teaching developmentally by 
A practical guide to transforming primary mathematics : activities and tasks that really work by 
Mathematics for children : challenging children to think mathematically by 
Visible learning for mathematics, grades K-12 : what works best to optimize student learning by 
Teaching secondary mathematics by 
Mathematics in early childhood education by 
STEM education in primary classrooms : unravelling contemporary approaches in Australia and New Zealand by 
Dance integration : 36 dance lesson plans for science and mathematics by 
STEM education in the primary school: A teacher's toolkit by 
Mathematizing children's literature by 
Using children’s literature to teach problem solving in math : addressing the standards for mathematical practice in K-5 by Useful Subject Term: Mathematics -- Study and teaching – Research
Approaches to qualitative research in mathematics education : examples of methodology and methods by 
Handbook of international research in mathematics education by 
International handbook of mathematics teacher education. Volume 1, Knowledge, beliefs, and identity in mathematics teaching and teaching development by 
