You should not skip any classes in normal circumstances. In case you miss any sessions due to unavoidable circumstances, you can still listen to the backup classes and understand the PPTs as these PPTs are easy to learn and understand. In the case of missing classes or sessions, you will miss direct learning from the experts in live sessions where you can interact, engage and ask questions. It is like missing a class physically and then trying to recover by studying books and other materials. Considering your circumstances you may be provided with backup classes by your trainer, you need to request the ADMI Program Management Team (ADMI-PMT) for this.