Boundary Layer Theory has its applications in aerospace, automobile, marine, oil and gas, sports mechanics, process engineering and many other fields. Many complex phenomena such as heat and mass transfer, flow induced vibrations in bridges and buildings, swinging of a sports ball in air, stalling of aircraft etc. can be explained through boundary layer theory. The understanding of Boundary Layer theory can help engineers to design fuel efficient automobiles, Aircraft and Ships, to design high performance heat exchangers, to design pipelines that consume very less pumping power and excel in designing any machines or processes that involve fluid flow. This interactive course will help students understand the Boundary Layer Theory with a slow and methodical teaching.