Learning English with Skype

Learning English with Skype is becoming popular. Prior to this, students had to go to a language school. For employees, to improve or learn English, they must arrange their schedules to attend night classes after work.
With the ability to study with Skype we can save much time and still practise English. However, some teachers teaching on Skype are not professional. Some of them don't prepare lessons before class. Others do not care for their students. Therefore, the quality of the lessons varies.

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In the first line you could also describe "language school" as "bricks and mortar". For example: Prior to this, students had to go to a bricks and mortar language school.

This makes it clear that before Skype students had to go to a physical, old-fashioned school.

Learning English on Skype

Learning English on Skype is a popular tendency. Prior to this, students had to go to the language school. For employees, to improve or learn English, they must arrange their time to attend night classes after work.
With the way of studies on Skype, we will save much time but still practise English. However, some teachers teaching on Skype are not professional ones. Some of them don't prepare lessons before class. Others are not caring their students. Therefore, quality of education varies.