Indus Valley World School Anandabazar Patrika(Schooley) 01.02.2018 (1) Indus Valley World School celebrate their Annual Concert, ‘Confluence’, with the eminent playwrite and actor Mr. Tathagata Chowdhary as Chief Guest. Indus Valley World School celebrate their Annual Concert, ‘Confluence’, with the eminent playwrite and actor Mr. Tathagata Chowdhary as Chief Guest.