2. そして、その会話の練習がしやすいように、会話練習のポイントとして、各課の機能をハイライトした会話の枠組みを示した。
My attempted translation: "Furthermore, in order to make the conversation practice easy ... (something about conversation practice points) ... (we) have laid out (示した) a conversational framework to highlight the function of each lesson."
I don't very clearly understand the function of として or how the middle part links with the rest of the sentence. I am also not very confident that I have parsed the last part correctly. I broke it down like this:
...[ [(各課の機能) を (ハイライトした)] (会話の枠組み) ] を 示した。
If you can make sense of this, is it right?