I agree with you, today's teachers are so obsessed with camera ya phone and social media posting than teaching. No wonder why grade 3 learners are unable to read in South Africa. 

Most teachers of nowadays focus on alcohol purchasing competition in Tarvens, Clubs & Shisanyama plus mjolo than preparing for kids curriculum. No wonder these days parents are the ones doing most of school work to help their kids at home.

In our times, our teachers taught us well to deeply understand and solve school work on our own. 

From primary to high school I passed without the help of my parents, but the help from teachers.

Today's teachers leave out some works so that they make you pay later as extra class lessons for money.