My student will pay for a semester plan. How do I set this up?

You can do this in two ways:

a) Create a recurrent contract with a CLOSED AMOUNT. This way, you can set it up so that DojoWeb will charge the fixed semester fee (the monthly fee multiplied by 6) every 6 months:

b) Create a customized contract, where the system will not create any charges automatically:

You will be responsible for creating the charges manually on the dates you choose (e.g., every six months) with the agreed-upon fixed amount: