This blog is something I've set up for the part of econ101ab (Principles of Economics), an introductory economics course at the University of Birmingham. I teach the second part ("b"), which is macroeconomics. In the coming term before Christmas you'll have lectures from Martin Jensen on microeconomics.
If you're unsure of the difference between the two, PJ O'Rourke has helpfully obliged with a definition:
One thing that economists do know is that the study of economics is divided into two fields, "microeconomics" and "macroeconomics". Micro is the study of individual behaviour, and macro is the study of how economics behave as a whole. That is, microeconomics concerns things that economists are specifically wrong about, while macroeconomics concerns things economists are wrong about generally.