Like many of you, I have fond memories of panty sightings in my middle school/high school years. Middle school gym class was a gold mine - lots of short shorts. One girl in particular had extremely short shorts that were (fortunately - for me!) slightly baggy as well. Pretty much every day I had an unobstructed view up the legs of her shorts to her panties, which were usually blue in color but sometimes white. The shorts were so small that I could see underwear peeking out both sides, with especially good views during stretching exercises. Several other girls in the class afforded upshort views on occasion, but none as much as this girl. I wasn't masturbating at this point in my life, sadly. I think this girl is what has given me a lifelong love of upshort shots, and incited my keen observation of the girls in all my gym classes from that point forward. It's amazing how girls feel so unrestricted in shorts, even though they can be just as indecent as skirts.
Another vivid memory was from eighth grade. I was in a classroom where the desk layout was half of the class facing the other half, with an aisle running up the middle. The common practice at the time was to rest your feet on the under-desk textbook rack attached to the desk in front of you. You can imagine that this didn't work very well with a short skirt on, so most girls were smart enough to avoid it. However, one girl came to class one day and obliviously put her feet up on the desk in front of her, giving everybody on the opposite half of the room a great view of the full-coverage white cotton panties covering her butt. To this day I think this is the most full-on upskirt I have witnessed, and also one of the hottest since I have quite the fetish for white cotton panties.
High school was an upskirt paradise as I'm sure it was for everybody who grew up in the early-2000's climate of miniskirts. I had many memorable experiences but most of them were your garden-variety "girl swinging legs out of desk and flashing panties"-type upskirts. I did get some decent looks while walking up stairs, and hardly a day went by when I didn't at least get a view of panties peeking out of the top of jeans or some distinct VPL's as a result of white, see-through athletic shorts.
One from the high school era stands out. We were doing a project in a social studies that involved making a poster. Due to the size of the posters, everybody was working on the floor, which was bad news for one girl who was wearing probably the shortest denim miniskirt I have ever seen. She was on her knees, bent over the poster, causing her skirt to ride up and expose her entire ass, doubly exposed since she had on a thong! She stayed in that position for at least thirty seconds before realizing how immodest she was. She didn't seem too embarrassed, just said "Oops! That's my butt," to nobody in particular while pulling down her skirt. For the rest of class she was very careful to not expose herself any further, but it didn't matter, because I had received an eyeful that I will certainly not forget any time soon.
I don't miss school at all, but I do miss all the panties that I got to see while I was there!