Doctor Lamerson was a teacher who taught the children of the Starfleet officers assigned to the Utopia Planitia Fleet Yards. Jake Sisko was one of Lamerson's students and found the teacher's lessons to be interesting.
In 2369, Benjamin Sisko brought instructional holos of Doctor Lamerson to Deep Space 9 for Jake to continue his studies. The holo was not programmed to answer all of the questions Jake had. (DS9 novelization: Emissary)