confusion over adjective placement

[imnopoet]

I've noticed that early in the lessons, an adjective usually comes after the noun it is associated with ...unless it doesn't.
Is there a rule for when to place an adjective before the noun? Thanks for the help!

[anomalocaris]

There is a rule! :) Adjectives describing beauty, age, goodness or size (BAGS) go before the noun, and the rest go after. Here's an article that explains it: http://french.about.com/od/grammar/a/adjectives_4.htm