back of his hand

The phrase “back of his hand” means to know something so well that you can recall it instantly and effortlessly, without having to think about it.

The origin of this idiom is not clear, but it is believed to have been derived from the practice of hand-to-hand combat where fighters would use the back of their hand to wipe away sweat from their forehead. This action would indicate that they were relaxed and confident in their abilities, and thus had a thorough understanding of the situation.

Example sentences:

  1. She knew the city like the back of her hand.
  2. He had studied for the test so thoroughly that he knew the material like the back of his hand.
  3. After years of working in the industry, she knew the ins and outs of the business like the back of her hand.
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Professor Emeritus of Educational Leadership University of North Carolina at Chapel Hill at Camford Publishing
Founder of On the Horizon (camford publishing)and The Technology Source, and professor of education at North Carolina at Chapel Hill; Dr. Morrison is author and co-author of over 200 publications focusing on educational planning and using information technology tools.Dr. Morrison has delivered numerous conference presentations and workshops for associations such as EDUCAUSE, AAHE, the College Board and others.He has served as a planning consultant to a number of colleges, universities, university systems, community colleges, educational agencies and public agencies such as the U.S. Department of Labor, and Department of the Army.His consulting activities focus on assisting organizations to integrate information technology tools in teaching and management.

The title of his Speech is “The Future of Distance Learning.” Professor Morrison will describe the driving forces that will affect education and distance learning in this decade and will focus on the implications of these forces for education and distance learning
Dr. James Morrison
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