Option 1 is my fist draft. I like having the two scales right next to each other but there is a lot of wasted space on the second card. There are also a lot of interval symbols to process in such a small space. The symbols that are barely used get just as much space as those that are used frequently.
I like Option 2 better in terms of format. The interval symbols that students will see most frequently are on the first card. Most of the flutter symbols on the second card will not be used very often but at least they are separate from the most used symbols. I think it makes sense to have the interval symbols next to the scales with the arrows showing whether they are ascending or descending. I feel like once students understand how the cards are set up it will be easy to use. There is the issue of what to put in the dead space at the bottom of the second card.
The third option would include the first card of Option 1 and the card at the left. I stopped part way through because I didn't like it. The symbols are organized based on the order that they are introduced in the Parallage Phrases. It is hard to process visually because there is no apparent pattern.
I hope to have a working draft by 2014. I am open to any suggestions regarding format.