This study reviews researches on learning difficulties in school mathematics conducted in Korea since 2015. It is investigated with a classification of learning disabilities in mathematics (LDM) and low achievement in mathematics (LAM). In total, 23 articles on LDM and 40 articles on LAM are analyzed by school levels, mathematical content and interventions applied. It is found that elementary school students and numbers and operations have been researched more compared to others. A range of interventions has been applied both in LDM and LAM and concluded as efficient. However, it is few that has been applied more than one research. From this, it is suggested that it has to be researched LDM and LAM in secondary school level and on overall domains of school mathematics such as geometry, variables and expressions, functions, probability and statistics. Secondly, interventions need to be researched extensively.