A couple of things to note about that page: One, it's obviously a Dan Parent story, probably from an issue of Veronica's own series. Two, Veronica's odd behavior is easily explained if you consider the evidence on the page -- why is Veronica wearing glasses? Why does she think to herself "I'm not sure, but I think he's a blond-haired football hunk!"? Why does she feel the need to introduce herself ("My name's Veronica. What's yours?") to Mr. Weatherbee? The answer to these questions is probably that she's wearing prescription glasses which aren't hers (possibly to impress people by trying to create an impression of intelligence and studiousness, which will render her more attractive), so she really can't see, and doesn't realize that she's flirting with Mr. Weatherbee (until that final panel). My guess would be that they're Dilton's glasses which Veronica somehow found, and she decides that since Dilton is respected for his intelligence, she wants to be respected for her intelligence as well, so she puts them on, seeking attention and respect as a brainy type.