I am a full time tutor at an established tuition centre specializing O lvl Biology (Express) as well as IP students (specifically RGS). I also teach O lvl Chemistry (Express), as well as Lower Secondary Science (Express). For RGS Lower Secondary Science, I specialize in the Chemistry module.
I have been teaching for a year, and am familiar with the syllabus for each of the subjects mentioned above.
As for A level Biology - I am exposed to A level topics since some are covered in the RGS IP syllabus. I scored well for A level Biology and graduated with an honours degree in Life Science from NUS.
So far most of the students in my classes have been achieving As and B3s, and I have had students thanking me personally for my patience and extra help out of class.