We were assigned by our teacher to make work sheets about electric circuits. I just wanna ask you guys if the the instructions for the work sheet i'll be doing is clear and grammatically correct.

here it is:

DIRECTIONS: Shown below are six circuits. Rank the circuits in terms of their total resistance. Put first the cicuit with the largest resistance and put last the circuit with the least resistance. If there are circuits with the same amount of resistance, give them equal ranking.

http://imageshack.us/photo/my-images/214/sampleha.png/
Are there ways for me to improve this?