Question on Python dictionary

# 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(theDict):
    return len(theDict)

def num_courses(theDict):
    courses = 0
    for i in theDict.keys():
        for j in theDict[i]:
            courses += 1
    return courses

def courses(theDict):
    newStr = []
    for i in theDict.keys():
        newStr.extend(theDict[i])
    return newStr

def most_courses(theDict):
    max = 0
    teacher = ''
    for i in theDict.keys():
        if max < len(theDict[i]):
            max = len(theDict[i])
            teacher = i
    return teacher

def stats(theDict):
    teacherList = []
    for i theDict.keys():
        teacherList.append([i, len(theDict[i])])
    return teacherList