Some Teachers set their Single-session Course lower than their Multi-session Course to attract more Students to buy the Single-session Course which gives them the opportunity to show their value. Other Teachers may think the exact opposite.
The Teacher is free to choose a price from a range of price options that 5StarTeachers provides.
They are free to design their own strategy.
For example, a consultant may only ever offer Single-session Courses that can be booked again and again. But a language Teacher may feel that you can't learn a whole lot in 4 Sessions, so besides the first Single-session Course, they may offer only 12-session Courses or 24-session Courses. It's up entirely up to them.
Currently Courses on 5StarTeachers can have 1, 4, 12 or 24 Sessions.