I listened to the audio. The 10 commandments were mentioned, but my guess is that any content that is read from the old testament or discussed would serve the same function.
Okay perhaps what is needed is something concise. Discussion of broad principles is good for stimulating thoughts but not conducive to memory. So a long random Parsha doesn't work. If something is also rhythmic, like a song, it's even better for memory. I just reread Psalm 1 and I like it too.