Denominations however are sub-groups within Christianity. They are grouped together by organization and belief.

Here’s a comparison chart that will give you exactly what you need in terms of their similarities and differences.

http://www.religionfacts.com/christianity/charts/denominations_beliefs.htm –

And btw, I found it humorous that probably no one from any of these denominations would have approved of your use of the word “damn” here. 😉 J/K

What class is this for?

Denominationalism is an ideology which views some or all Christian groups as being, in some sense, versions of the same thing regardless of their distinguishing labels. Not all churches teach this. The Roman Catholic and Orthodox Churches do not use this term as its implication of interchangeability does not agree with their theological teachings. There are some groups which practically all others would view as apostate or heretical, and not legitimate versions of Christianity.

There were some movements considered heresies by the early church which do not exist today and are not generally referred to as denominations. Examples include the Gnostics (who had believed in an esoteric dualism), the Ebionites (who denied the divinity of Jesus), and the Arians. The greatest divisions in Christianity today, however, are between Eastern Orthodoxy, Roman Catholicism, and various denominations formed during and after the Protestant Reformation. There also exists in Protestantism and Orthodoxy various degrees of unity and division.

Comparisons between denominational churches must be approached with caution. For example, in some churches, congregations are part of a larger church organization, while in other groups, each congregation is an independent autonomous organization. This issue is further complicated by the existence of groups of congregations with a common heritage that are officially nondenominational and have no centralized authority or records, but which are identified as denominations by non-adherents. Study of such churches in denominational terms is therefore a more complex proposition.

Numerical comparisons are also problematic. Some groups count membership based on adult believers and baptized children of believers, while others only count adult baptized believers. Others may count membership based on those adult believers who have formally affiliated themselves with the congregation. In addition, there may be political motives of advocates or opponents of a particular group to inflate or deflate membership numbers through propaganda or outright deception.