Interaction can be defined as a situation where two or more people or things communicate with each other or react to each another:

It involves communicating information and obtaining feedback.
ICT can be used very effectively by teachers to interact with students as well as parents.
Parents can be kept informed about various activities happening in the school, their ward’s progress and other discussions related to the ward can be conducted using chat forums.
Software such as google classroom can be an effective tool to interact with the students, share projects and other study materials.