"My son is a good student."
Translation:Ο γιος μου είναι καλός μαθητής.
Look at the top of this page. Do you see the correct translation? Then you can see that "καλός" is correct. Maybe there was something else wrong?
So, use these instructions to find out how to move on.
TIPS TO MAKE LEARNING EASIER + HOW TO REPORT A PROBLEM…..
And check out the Greek Forum here with more links.