On this site you can read a paragraph and get feedback (rules) about how por and para are used. Remember our "songs" and think about the differences. Then try the next link (at Studyspanish.com) and see how you do.
Based on the meaning, do you need to use 'por" or "para." Try this interactive self-check "quiz" and see how you do. Any questions, come and see me.
This site gives a comprehensive explanation of how to form and use the conditional tense in Spanish. It also contains links on the left to interactive self-check activities.
Use the simple chart of how to form the conditional tense in Spanish and try the interactive quiz. Challenge: Can you translate the sentences you created?