It was an English vocabulary supplement. Endorsed and taught by the FMA characters.
Yes, you read that right. Lucky Japanese high school students can be taught handy English words like "disaster", "mutation", and "luggage" by their favorite alchemists and homonculi! I bought it, of course, but it's just too good not to share. And so, I bring you, scanned and translated where necessary...the first installment of The English Alchemist!
Intro Page 1
Intro Page 2
Ed's Lesson, Part 1: Bathe, Violate, and Chemistry