Please help me!

# The dictionary will look something like:
# {'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'],
#  'Kenneth Love': ['Python Basics', 'Python Collections']}
#
# Each key will be a Teacher and the value will be a list of courses.
#
# Your code goes below here.
def num_teachers(test2):
    return len(test2)
def num_courses(teachers):
    total = 0
    for value in teachers.values():
        # for the number of courses within that value
        for course in value:
            total += 1
    return total
def courses(teachers):
    output = []
    for courses in teachers.values():
        output +=courses
def most_courses(dic):
    course_count = 0
    teacher_name = '' 

    for teacher, courses in dic.items():
        if len(courses) > course_count:
            teacher_name = teacher
    return teacher_name



    return output