I have a lab report due tomorrow i need some tips on writing a strong conclusion?

if anyone could give me some things i need to include in it or anything that would be great - by the way its for a CP physics cl - it was an experiment on finding the dependent variable in a pendulum- weather it was the length of the string, the m, or the angle held at, and from the results it was clear that it was the length of the string, because it made the most dramatic changes in the time period. but i am supposed to write 1-2 pages on that....anything else i could say in it besides knowing that the dependent variable was the length of the string?