# 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(teachers):
    count = 0
    for teacher in teachers:
        count += 1
    return count

def num_courses(teachers):
    count = 0
    for value in teachers.values():
        for course in value:
            count += 1
    return count
def courses(teachers):
    output = []
    for courses in teachers.values():
        output += courses
    return output

def most_courses(teachers):
    bid_num = 0
    big_teacher = ''
    for teacher in teacher_dict:
        class_num = len(teacher_dict[teacher])
        if (class_num > big_num):
            big_num = class_num
            big_teacher = teacher
    return big_teacher