Wildan Insan Fauzi, M.Pd, became a speaker at the Social Sciences National Science Olympiad (OSN) training for junior high schools in Berau Regency, East Kalimantan, on 24-25 May 2022. The activity was held at SMPN 1 Berau with 50 teachers from Berau Regency as participants. . After the training, the presenters were invited to tour historical objects around Berau, one of which is the Pagaruyung palace. The economic activity of the Berau community, apart from the trade sector, relies on the mining sector, especially coal.