Some people find a group ground-school course advantageous, others
prefer to study at home alone. Another school in Arizona had a ground
school course that was $200 for 6 weeks, meeting 2 nights/week for 2-3
hours. Between each class, students were to read two chapters in the
Jeppesen Private Pilot book. There were 12 people per class, and at the
end, most were ready to take their written exam. The good thing was that
everyone benefitted from the discussions resulting from everyone's
questions. Again, just depends what you prefer or need (group vs.
one-on-one).