Concept and Overview of the Use of extension methods Concept and Overview of the Use of extension methods Please Login to view this lesson. Login Page Back to the course AEM701:Agricultural Extension Education Lessons Strategies to create effective communication in extension 05:51 Problems in Communication Process 06:55 Problems in Communication Process II 07:01 Concept and significance of instructional Materials in Extension 07:13 Classification of instructional materials 05:18 Description of instructional Materials In Agricultural Extension 08:28 General guidelines selection and effective utilization 06:10