my husband and i offer our children Classical Christian education in our homeschool... it's rigorous and exciting... and we do not do "grades." i am sure if you have children, you have helped them learn something along the way without actually grading them... but you still assess where they are...
you know if they have grasped a concept or a skill... you know if they need further assistance or if they simply need practice... though we as parents may not hand out report cards to our children, the truth is, we still assess them in many areas of their lives...
I'm teaching our 9 y.o. Esperanto, since it's an easy first second language. Her 7 7.0. sister is learning to type -- in a few more weeks, I hope to start her in on Esperanto as well. After that? We'll see what they want to do at that point.