Professor Calvin has prepared for the last day that his students will be in school because they will soon go on summer vacation. Somewhere adrift in his office lays his grade-book that he has lost and he must find it quickly so that he can tell his students their grades before they are released. Professor's Diary is one of our many Hidden Object Games that we publish on TheGamerStop.com. This game is also tagged as a Hidden Objects game. Click the play button to start having fun. To play even more free games, view our popular and new games page. If you want to play more games like this, then you can simply check out the games inside the game tags that are the most relevant to your interests or the Hidden Object Games category or the games like this game page at the end of the game tags.