How to take an argument within a method, and to make an if-statement that returns one out of to other methods in class.

The challenge isn't asking you to provide a solution to take the input, but rather saying that feedback, should take an argument. So you the first line of the function is redundant.

It also ask you to run praise if the grade is over 50, and reassurance if it's 50 or below. So your if-statment should take this into consideration.

Also, since praise and reassurance are methods of the Student-object you use self.method() to call them.

class Student:
    name = "My name"

    def praise(self):
        return "You inspire me, {}".format(self.name)

    def reassurance(self):
        return "Chin up, {}. You'll get it next time!".format(self.name)

    def feedback(self, grade):
        if grade > 50:
            return self.praise()
        return self.reassurance()

The way you would use the feedback function would be something like:

student = Student()
student.feedback(54) #You could either print the return statement, or save it to a variable

Of topic, but one typo in your code that will cause problems. grade=int(input('what is your grade? ') You are missing a closing parentheses to close out int(), easy thing to miss.