Dr Declan Cathcart has been teaching Biology for over 20 years at both secondary and university level. He is the author of the textbooks Active Science and Biology Extra. He teaches at Temple Carrig School and UCD, and works with the Professional Development Service for Teachers (PDST). Over the years, Declan has run one-day intensive Biology Revision Days for Leaving Cert at Trinity College and other venues. His revision courses are exam-focused and aimed at maximising grades.