Yes, Whitman is your high school. As suggested, you may call, or go to the Montgomery County Schools web site to verify.
Also, I checked the public records and it appears that you've lived there since 1988. I love Huntington Parkway. It's a great location! Are you planing to sell the home sometime soon? If so, I specialize in listing properties in close-in Bethesda and would be happy to evaluate it for you.
If you have more questions, please contact me at 301-440-4805.
MARYLAND HOME REALTY
school assignment locator
According to this site, your Elementary School Is Bethesda Elementary, Middle School is Pyle and High School is Walt Whitman,