What is the difference between Intensive Course and Semi-Intensive Course?

All levels from A1 - C2 are split into two courses (e.g. A1 into A1.1 and A1.2). Every course can be done either as an intensive or semi-intensive course. 

Intensive Course  Semi-Intensive Course
  ✔️ 4x week 
 ✔️ 3 hours per day
 ✔️ 4 weeks
 ✔️ online or in-house
 ✔️ finish one sublevel within this course (i.e. A1.1 or A1.2)
 ✔️ 2x week 
 ✔️ 3 hours per day
 ✔️ 8 weeks
 ✔️ online or in-house
 ✔️ finish one sublevel within this course (i.e.  A1.1 or A1.2)