High school physics teacher and lecturer (1, 2, 3) And university preparatory physics (101, 102, 103, 104, 105, 107, 109, 110, 111, 121, 125, 130, 131, 201, 205, 207, 212, 225, 245, 331) For communication, mobile and WhatsApp (( Phone number appears when clicking the contact button ) )