Pick the conventions you want to work on. The tutor deals hands built for them, bids for your partner and the opponents, and tells you whether your call was right, and why.
Pick one convention or several, your bidding system, and whether you want to open, respond to partner, or a mix of both.
You sit South. Make your calls with the bidding box. The tutor bids for the other three seats and explains what each call means.
After the auction, every hand is revealed, along with how many tricks the contract takes with best play, suit by suit.
Plus natural bidding with no convention. Play Standard American, 2/1 Game Force or ACOL.