Freestyle has a slightly different scoring and rules, this is the same style most similiar to that used in the Olympics.
you can view the current rules (2014) here
The majority of freestyle wrestling tournaments occur in the spring and the season can continue into june/july for those qualifying for national level competitions. Many times, freestyle tournaments also have a coresponding Grecko Roman competition the same weekend.
This link on the USA wrestling site has over 50 tutorials on freestyle wrestling moves.
More information about USA Wrestling can be found at www.usawrestling.org
A list of club's in Massachusetts can be found here
You can purchase a USA Wrestling card here.
USA also offer's a coaches certification program. This certification is required for coaches at some tournaments before a coach can enter the floor or sit at the corner of the mat, this is mandatory for state level and above tournaments. Some tournaments don't allow wrestlers unless they are accompanied by a certified coach.
USA offers several resources for certfication, including an online training course and clinics, here.
An online certification course for the Copper entry level with video's and text books can be found here.
Pee Wee 5-6 Bantam 7-8 Intermediate 9-10 50-120lb Novice 11-12 60-140lb Schoolboy/girl 13-14 70-265lb Cadet 15-16 84-285lb Juniors ( High School Grades 9-12) 98-285lb