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ChienChien 

Many-to-Many relationship with Contact

I am trying to build a many-to-many relastionship between Contacts and a custom object Classes. I also had a join object to make that many-to-many relationship works. The problem is I cannot create a mass email list according to a class name. Is there a way to add the information of Class into Contact's search field list?

I also created a new field "Class Code" under Contacts. I like to add a new class code after the current class code everytime I update it. And, the class code will be like "MSTU 4000/INDT 3000/MATH 5000". So, I have a history of what that student has taken. To do that, I guess I have to retrieve the current class codes, compare them with the new class code, and insert or update it.

I am new to this SalesForce system. Is there a good tutorial that I can take a look?

Thanks a lot,