One of the primary objectives of the Catch 'Em All Challenge is to become a Professor inside the game. To achieve this, you need to go to a university, followed by attending a graduate school.
How to go to a Graduate School in BitLife
To go to a Graduate School, you must maintain a good smarts stat over 90 throughout your lifetime. After joining a school, use the Study Harder option yearly from the Activities tab to improve the smarts parameter. Along with that, visit the Library or join a debate club to be sharp during your school days.
After graduating from high school, it's time to join a college. Apply for a major in English, History, or Math while navigating the list of available courses in a college. Finish college with flying colors by using the same Study Harder option in university as well. The next step is to join a Graduate School. Visit the education tab from the jobs section and choose the Graduate School option. You will be allowed to start Graduate School if you have maintained the smart stat over 90 till now.
How to become a professor in BitLife
After finishing Graduate School, it's time to become a professor. By default, the game does not allow you to become directly, as it requires more than ten years of working experience in the educational field. You can gain this experience by starting as a School Teacher or History Teacher. During this time, you can earn some promotions or switch jobs, like becoming an Assist Principal, Principal, or Assist Superintendent, to put yourself in a better position while applying for the Professor post.
After gaining the required experience, you can look for a post titled Professor(University District) from the jobs section. If you have followed everything religiously up to now, you will crack the interview and become a professor.