help please with my code

# The dictionary will be something like:
# {'Jason Seifer': ['Ruby Foundations', 'Ruby on Rails Forms', 'Technology Foundations'],
#  'Kenneth Love': ['Python Basics', 'Python Collections']}
#
# Often, it's a good idea to hold onto a max_count variable.
# Update it when you find a teacher with more classes than
# the current count. Better hold onto the teacher name somewhere
# too!
#
# Your code goes below here.
def most_classes(teachers):
         counts = []
         max_classes = 0 
         for key in teachers:
             counts.append(len(teachers[key]))

         for value in counts:
             if value > max_classes:
                max_classes = value 

         for key in teachers:
             if max_classes == len(teachers[key]):
                return key
def num_teachers(teach_dict):
  teach_count = 0
  for name in teach_dict:
    teach_count += 1
  return teach_count

def stats(teachers):
  total_stats = []
  for teacher in teachers:
    total_stats.append( [teacher, len(teachers[teacher])] )
  return total_stats

def courses(teachers):
  course = []
  for key in teachers:
    course.append(teachers[key])
  return course