ACJC has won the national debating championship for pre-university institutions on a number of occasions, most recently in 2014. ACS (Independent) also won the competition in 2010. ACS (Independent) won the Singapore Secondary Schools Debating Championships (SSSDC) Division I title in 2005 and 2013, and was also crowned National Secondary School Debating Champions in 1998 in the pre-SSSDC era. ACS (Barker Road) won the SSSDC Division II title in 2010 and 2014 and Division III title in 2004. Many debaters from the schools have gone on to represent Singapore in the World Schools Debating Championships.