He described Changi Airport as "a symbol of efficiency and trust".
The teacher was heard shouting at the boy to drink water.
The man was reportedly drunk & refused to cooperate.
Mr Ng listed two major challenges that he thinks Singapore will face during CNA's Presidential Forum on 28 Aug.
Mr Tan also suggested bringing down wages in order to boost Singapore's competitiveness.
The MPV tried to overtake a lorry in front, but couldn't avoid another one coming from the opposite direction.
His main concern was the challenges of Singapore's young people, he said.
The election should be a contest between individuals, he added.
Sembawang MP Poh Li San said she understands that the teacher has been dismissed.
She had a habit of lying on her side and looking at her phone for long periods of time.