IVWS student wins silver in Karate Championship | Indus Valley World School IVWS student Sayan Basak has won Silver Medal of the 3rd ALSOC WEST BENGAL INTER-SCHOOL KARATE CHAMPIONSHIP-2017 held on 15th January, 2017. IVWS student Sayan Basak has won Silver Medal of the 3rd ALSOC WEST BENGAL INTER-SCHOOL KARATE CHAMPIONSHIP-2017 held on 15th January, 2017.