I totally understand.

Our ds now 11 was in the local public school 1st through 4th grade.
He went to a private preschool and kindergarden. He took the sb5 at 6yrs old which confirmed our suspicions that the was (bright) LOL. The public elementary school subject accelerated him 2 years in math and LA. Then in 4th grade he was basically out of curriculum for the school (the teacher would work with him). 4th grade year was basically a wash except for math which we supplemented at home and with a tutor.

The spring of the 4th grade year we took him to a math competition at a local gifted school. It just clicked, he was in a gymnasium filled with kids who were good at math. He won 2nd place in a group competition, you could not wipe the smile off his face.

For the longest he was tested beyond what was needed. He took the EXPLORE in 3rd grade and hit Davidsons benchmarks on each subject. With all that it was that night at the math competition and that smile that made it sink in. He is now in that school.

The local public elementary school did all they could. I could not expect the 4th grade teacher to teach him at the level he needed in any subject really.

That is a brief of our story.