First Semester Math Memories

This semester I have learned a lot about math since I have been taking algebra, which is a new type of math to me.  It has been pretty easy to understand, but some things were harder.  For example, at the end of last quarter we learned about solving more complex equations and systems by using methods such as substitution and elimination.  These topics could get a little tricky and confusing to me, and they still are, but not as much as they were at first.  My teacher explains everything very well in class and on the videos we watch for homework, so even if you don't get it at first you will eventually understand.  So this is basically all that has recently been hard for me this semester in algebra.