Students appearing for CREST Olympiads will need to prepare for the following subjects -  Mathematics (CMO) - For classes Prep/KG and 1-10 Science (CSO) - For classes Prep/KG and 1-10 English (CEO) - For classes Prep/KG and 1-10 Computer (CCO) - For classes 1-10 Reasoning (CRO) - For classes 1-10 Spell Bee (CSBW) - For classes 1-8