Students should document their CAS activities noting in particular their reﬂections upon their experiences. This documentation may take many forms, including journals, blogs, videos, illustrations, and photography. Where a school is required to submit student CAS records to the regional ofﬁce, the records required will include up to 10 sample pages from the student’s ongoing documentation. These sample pages must include a list of the principal activities undertaken and evidence of both planning and reﬂection. It must be possible for the IBO evaluator to tell: what happened, why it happened, how it happened, what its value was, and what the student learned from it.