The IA

The individual investigation for internal assessment (usually just called “The IA”) is a practical assignment that all ESS students will complete. This series of videos covers all aspects of the assignment from start to finish.


The IA makes up 25% of the final score on the course.

The assignment will be submitted as a lab report and should be 1500 – 2250 words in length.

Students should spend about 10 hours of class time on the assignment plus additional time writing up.


Students will be marked according to the criteria in the ESS subject guide.

A use friendly marksheet for giving clear feedback to students is available here.

The ESS IA Video Guide Series