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Indonesian National Education Day or Hari Pendidikan Nasional abbreviated as HARDIKNAS is celebrated on 2 May. [1] It was initiated in remembrance of Ki Hajar Dewantara, the founder of the Taman Siswa education system. His educational philosophy Tut Wuri Handayani means that we can help others learn by coaching and mentoring.
Sulfur dioxide (IUPAC-recommended spelling) or sulphur dioxide (traditional Commonwealth English) is the chemical compound with the formula S O 2.It is a colorless gas with a pungent smell that is responsible for the odor of burnt matches.