If you are planning on doing an EE in one of the following topics read this introduction (pdf) to the EE for Group IV first.
Resources from Teachers
Guide to a Group IV EE (designed for Physics but works for all Group IV)
Overview
Choice of Topic
Treatment of the Topic
Subject Specific Criteria
General EE Criteria (Unpacked)
Sample Essays
Introduction to Interdisciplinary Extended Essays (pdf)
Physics Outline Guidance (from Mr. Richards)