Did he understand?

During my management experience for my Final Project, as a leader,  I learnt that when I explain my request, my comment, or my feedback to a team member, it is NOT completely conveyed until they can rephrase my message back to me accurately. Having them to take notes is one thing but to ensure that he/she understood what I need from them is another. They must be able to repeat the request for me in their own words and even better, provide examples based on their own interpretation of the message.