Asuna dreams of 15 year old Negi. But, IIRC, Nagi was about the same age as that during his time with Asuna. Maybe a little older but not much.
Asuna skips the art club fairly often.
The Age changing pills have limits. It can get 9 year old Negi to age 15, but not 30, and 14 year old Konoka to 21 and 7.
Gotta laugh at all those girls in the background blatently checking Negi out - to the point of turning around to watch him walk away.
Negi's good at shooting. Marksmanship Class is apparently a thing at Magic School.
We find out a little more about Asuna's past. Suspcious sorts will find it curious that the closest thing Asuna had to a guardian was Takamichi, the man in on the whole Mage thing.
Courage = magic makes its return.
Knowing what I know now, Yue's lingering stare when Negi acepted Nodoka's date invitation takes on a whole different conotation.
Its times like Aged!Kotaro meeting Kugimiya for the first time and her thinking to herself that he's her type that make me realize that Kotaro is almost as Harem-y as Negi sometimes. There are at least 6 girls Kotaro is teased with to some degree or another. But Negi eclipses him on that front so badly you don't even really notice.
Also, either he can't see ghosts or he's completely nonpulsed by them.
Negi's Festival Schedule - impossible without Time Travel.
During Negi's meeting with the head master, observant readers will note the young nun trying to make herself scarce.
And the girl with pigtails - I don't remember her. Have ta keep an eye out.
The offical Trans implies that the Magic Teachers actually teach magic at Mahora. Considering this is Mahora, its more likely than you'd first think. It also states that this is not all of the magically aware students either.
Mana's absence is notable too.
Hakase and Chao have (Tech) invisibility cloaks. Magic > Tech in this case.
The students of 3-A pull two (maybe 3) all nighters before the day of the Fest. No wonder Negi fell asleep. Or possibly that was the roofie CVhao slipped Setsuna and him(?)
Kotaro - still nerfed.
Machine Support - a thing common place in future fights. (Magic Apps?)
Chamo - surprisingly useful. I kind of remembered him as this useless perv, but between Telepathy Jamming, Age changig sweets and general brain power, he's actually pulling his weight.
Even before the Fest Chao has been a persistant problem when it comes to magic, and is on her thrid warning when she spys on the World Tree meeting. But she's also been useful to the staff.
Acording to the notes at the back of Vol 9, Mage's often display a form of low level ESP, allowing them to read minds, predict the future, see through illusions, sense magic, sense the supernatural etc etc.
Also, Sayo was involved in a series of murders ans its Kazumi's Journalism finding the truth of that mystery that frees Sayo from the classroom; She was apparently confined to 500 metres from the classroom.
But this was probably dropped from canon.