I've been studying NGE/5% theology for 25 years. I'll break it down like this. In 1930, a man named W.F. Muhammad came to Detroit, Michigan and started teaching black people a religion that he called Islam. He started what would later become known as Temple #1. When the police found out what he was doing he was ordered out of Detroit. He gave special instructions to one of his followers, Elijah Muhammad. Then W.F. Muhammad moved to Chicago and started Temple #2 and showed Elijah Muhammad how to set up a temple. Around 1934, W.F. Muhammad mysteriously disappeared but he left Elijah Muhammad in charge. The organization that he/they founded was The Nation of Islam. When Elijah Muhammad died in 1975 there were over 75 temples across America.
The Nation of Islam's core beliefs are based on The Supreme Wisdom Lessons(which you can find online if you look hard enough). The Nation of Islam's Supreme Wisdom Lessons are as follows;
1. The Original Rules of Instructions (1-13)
2. Actual Facts (1-20)
3. The Student Enrollment (1-10)
4. The English Lesson C-1 (1-36)
5. The Lost Found Muslim Lesson (1-14)
6. The Lost Found Muslim Lesson (1-40)
7. The Problem Book (1-34)
So Elijah Muhammad made all of his followers study those lessons. He also wrote several books in the 1950s and 60s that Nation of Islam followers study. Sometime around 1963-65, one of his followers, Clarence 13X from Temple #7 in Harlem, NY left the temple and started his own movement. He took the lessons that Elijah Muhammad taught and began teaching outside of the temple. He added two (or three) lessons, The Supreme Mathematics and The Supreme Alphabets. That organization is called The Nation of Gods and Earths, although there's another organization called The Five Percent Nation of Islam, which is basically the same thing (its like the difference between Lutherans, Episcopalians, 7th Day Adventists and Baptists). There's also an organization called The Allah team that has a website.
So anyway, the 5% Nations Lessons are called "120" and are as follows;
1. The Supreme Mathematics (1-10)
2. The Supreme Alphabets (1-26)
3. The Student Enrollment (1-10)
4. The English Lesson (C-1)
5. The Lost Found Muslim Lesson (1-14)
6. The Lost Found Muslim Lesson (1-40)
7. The Actual Facts (1-13)
8. Solar Facts (1-9)
Most 5%ers end up joining the Nation of Islam which is currently led by Minister Louis Farrakhan.
I hope that answers your question.