Theory of knowledge (TOK) is assessed through an exhibition and a 1,600 word essay.
It asks students to reflect on the nature of knowledge, and on how we know what we claim to know.
TOK is part of the International Baccalaureate® (IB) Diploma Programme (DP) core, and is mandatory for all students.
Learn more about theory of knowledge. You can also find examples of TOK essay titles and read about how the IB sets deadlines for TOK.
You may also be interested in the other components of the DP core: creativity, activity, service (CAS) and the extended essay.
Learn more about TOK in a DP workshop for teachers.
DP subject briefs
Our course selection guidance contains subject briefs for both standard and higher level, including information about core requirements, aims and assessment.