Topics I have taught in the past (both in one-to-one tutorials and in seminars) include:

Metaphysics and Epistemology
Introductory Formal Logic
Philosophy of Logic and Language
History of Modern Philosophy
Philosophy of Mathematics
Philosophy of Mind
Wittgenstein's Tractatus

Over the last couple of year I gave the following courses of lectures:

Ontologies of States of Affairs, Cambridge 2003
Philosophy of Mathematics, Oxford 2003-2005
Frege, Russell, and Wittgenstein, Oxford 2004-2006
Introduction to Metaphysics, Oxford 2005, 2006
Introductory Logic, Durham 2006
Ontology, Durham 2006
Early Modern Philosophy, Durham since 2006
Metaphysics, Durham 2009
Ancient Philosophy West and East, Durham 2010