Are you asking for a problem to use in your class or do you have a problem with a bank reconciliation?
If you are asking for a really good problem, I use the "Shear Madness" case in my classes for the bank recon. It's very comprehensive but certainly doable. It also gives the students a good look at auditing. There are two parts (it's really written for an auditing class). However, I use the bank recon portion in my intro financial class.