David S. yana da M.Sc. daga Jami'ar British Columbia, Kanada, kuma shine mafi karancin shekaru kuma daya daga cikin manyan malamai a Jami'ar kafin shiga Reach Out. Ya buga ayyuka iri-iri a cikin mujallun kimiyya. Ya kasance yana haɓaka manhaja a Vancouver tsawon shekaru kuma yana koyar da SSAT, SAT, AP, IB, ilmin halitta, ilmin sunadarai, ilimin lissafi, ilimin lissafi da darussan kimiyya. Baya ga turanci, yana jin Jamusanci, Yaren mutanen Sweden da Sinanci. Yana da salon koyarwa da nishadi da nishadi kuma yana zaburar da dalibansa da sha'awar sa.