I don't personally see much use of a dislike button. However, I think the favorite button would be extremely useful for the client and users. I figure since we will have so many cards, why would we need to dislike a single card; since all the cards that will show at the top should in theory be our favorited/filtered cards. I think that it would be beneficial to automatically favorite the cards from saved lessons because users might not want to always edit previous plans, they might want separate configurations of favorited cards.