Blended Learning means combining online and offline educational methods so that they reinforce each other. Online elements are not just added on, or used to replace offline elements. Blended Learning requires that the online and offline methods are carefully selected and designed. Take instructional videos: they will be ineffective if provided as additional material, without changing lecture content and introducing interaction. However, they can be very effective when they are essential to successfully participate in class discussions, quizzes or assignments.