Motivation is the reason for people's actions, willingness and goals. Motivation is derived from the word motive which is defined as a need that requires satisfaction. These needs could also be wants or desires that are acquired through influence of culture, society, lifestyle, etc. or generally innate. 

Without motivation community learning would be strenuous or impossible. To have effective communities the motivation for participation should be investigated and this should form part of the building blocks for Learning. Collaborative learning is achieved when all participants are motivated and invested in the process and contribute.

Interaction with the content could be facilitated by conducting the problem based learning group works and by utilizing the online quiz tools like clickers, kahoot etc. 

Interaction with the instructor can be better achieved by the presence of instructor in online educational platforms and discussion forums. 

Student, student interaction: Interaction among students could be facilitated by creating different online discussion forums on a particular topic, allowing students to review other students report or work and asking the student to come up with relevant questions. 

Also please feel free to watch the video above.

from Harland, Tony & Pickering, Neil (2011) Values in higher education teaching

Collaboration and competition in learning do not need to be mutually exclusive. Principles of competition can be used to enhance collaboration skills.