This document presents research studies/findings and provides a developing point of view on adolescent thought. The first chapter discusses the nature and definitions of thinking. The second and third chapters discuss frameworks for adolescent thought (focusing on the Gestalt school, Geneva school, and accelerated learning) and survey studies on problem-solving in elementary/secondary school science. The fourth chapter summarizes 13 studies undertaken at the Regional College of Education (Ajmer). Topics of studies include thinking among adolescent age science students; factorial study of adolescent thought using Piagetian tasks; problem-solving behavior in physics; growth of exclusion variables during adolescence; role of hypotheses in solving science problems; formulating/testing hypotheses during adolescence; concept formation and intellectual development; formation of experimental mind during adolescence; relationship between hypothesis testing ability in science and creativity; problem-solving ability and relative personality traits using Piagetian tasks; effect of training on stating/testing hypotheses; conservation of mass, weight, volume, and concept attainment in age 10-18 Indian students; and child's conception of movement. The fifth chapter highlights (in table form) major findings from 112 studies. The final chapter presents a current picture of adolescent thought. A full bibliography is also available from the author upon request. (JN)