I have the same thing =| my teacher went to Japan for christmas and new year and i didn't do anything for 3 weeks (..the shame) and now i have to learn my Katakana all over because it flew out of my head and i don't remember a thing, and i just can't get the way you create sentences in my head =\
Isn't there like a site where the computer asks you to translate the words it show, or a program.. like
Hiragana and Katakana Practice - Real Kana but then with words? =D