How can I overcome my feelings of inadequacy in teaching my child, especially my high schooler?

Face it! We are all inadequate to the job! No one has complete knowledge of everything.

What you do have is a knowledge of the interests and capabilities and learning styles of your child. The state's system cannot do a better job. More.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.