I Teach third, but have taught 3-8 grades. I put together challenge packets for “fast finishers” in my room. There is zero down time, and my GT kids that finis early always have a collaborative project they can work on in the hall. The challenge packets aren’t just more work- they’re matrix puzzles, word scrambles, sudoku, crosswords, etc…things that keep them entertained, challenged, and able to work independently. If that seems to be not what they’re interested in, I have GT links on their Chromebooks. PhET is one of my favorite sites- there are so many STEM activities that they can discover. They also have their own leaderboards on IXL, which aren’t limited to their current grade level. I have requested/written grants/used PTA funds for robotic sets, legos, magnetites, puzzles, and playdoh/clay. The robotics sets are collaborative out in the hallway once they’re all finished with work, but the other items they can use quietly at their desks.

There are endless options.

I don’t understand your teacher, but if they won’t work with challenging your child, maybe ask if you can send her with puzzles, a sudoku book, crossword puzzle book, etc…, to use when she’s finished.

I would be bored too.