This paper describes the development and structure of an Electronic St
udy Guide for Oncology (LETSGO) for undergraduate medical students. LE
TSGO is aimed at clinical students learning about cancer. The subject
of the guide is breast cancer and learning objectives cover structure
and function, behavioural science, public health and epidemiology and
professional and personal values. LETSGO is designed to follow the ste
ps used in problem-based learning. The student is encouraged to carry
out individual brainstorming around cases with the issues identified a
cting as the first step in an educational audit loop. Clear definition
of prior knowledge is available by way of interactive features, and h
yper-text links to core text and diagrams (including microscopic secti
ons) precede definition of both broad aims and objectives for the modu
le and specific objectives for assessment purposes. Core knowledge is
available via hyper-text links. Assessment has three components: open
ended questions asking for free text responses linking to 'model' answ
ers; extended matching items linking to 'model' answers and providing
peer-referenced feedback as a bar-chart distribution, and an education
al audit loop referring back to the original issues identified at the
beginning of the package in brainstorming. Clear mapping throughout th
e guide is a major feature and the student's progress is clearly displ
ayed at each stage of the guide. The program provides dynamic access t
o the student's existing knowledge base and stimulates new learning ba
sed on the student's own learning needs.