09/18/2021 (Institute of Technical Education, College Central)
01/01/2020 and 06/30/2021 (Institute of Technical Education, College Central)
01/01/2017 and 12/31/2018 (Whitley Secondary School)
01/01/2017 and 12/31/2018, Whitley Secondary School
01/01/2-16 and 12/31/2016 (Bishan Park Secondary School)
01/01/2016 and 12/31/2016 (Bishan Park Secondary School)
01/01/2016 and 12/31/2016 (Bishan Park Secondary School)