It is the need of today's society that people are able to solve complex problems efficiently. Being able to successfully solve problems is more than just accumulating knowledge- it involves development of flexible, cognitive strategies that help analyse different problem situations to produce meaningful learning outcomes. Online training package on Scaffolded Problem Based Learning Strategy using the learning management system, MOODLE is intended to guide student teachers to become experts in the field of study, capable of identifying the problems based on the domain knowledge of the discipline and analyzing and contributing to the solutions in a completely online mode. The online training package, designed on the lines of ADDIE model is assigned four credits and student teachers need to put in 120 hours of study for completion of the training. The package incorporates PBLS, follows collaborative approach and has provision of scaffolds. The study was conducted on 41 student teachers of Hansraj Jivandas College of Education. The student teachers were selected on the basis of their competence in the use of computer and internet. The student teachers undertook the online training in Scaffolded Problem Based Learning strategy (PBLS) wherein the student teachers had to solve ten problems related to difficulties faced by school teachers and administrators in the implementation of various aspects of PBLS. For every problem the researcher conducted a problem discussion, identification and definition in a synchronous mode and observed the student teachers during the process. The researcher observed the student teachers during the process of problem discussion and identification and defining of the problem, in a synchronous mode. Observations indicate that the student teachers took less time as they proceeded from problem one to problem ten with respect to problem discussion, identification and problem definition. Also ambiguity with respect to the process of problem discussion reduced and student teachers gained confidence about the problem discussion, identification and definition process. Online, Learning Management System, MOODLE, teacher training, Problem based learning, Scaffolds, problem discussion, problem identification, problem definition