From what I have read you need to show work at LEAST 3 grade levels above.It's okay to assign work yourself that is above grade level for the portfolio. You can show him doing some 4th-5th grade math, reading comprehension, etc worksheets. I know a lot of people do videos of their child reading at a very advanced level and then discussing it. There have been a couple of recent portfolio questions on here with lots of ides. Good luck. We are applying for May, but I didn't do a portfolio, just IQ and achievement scores.