The following definition of a developed country is used:

For the US, this source will be used:
https://en.wikipedia.org/wiki/List_of_school_shootings_in_the_United_States_(2000%E2%80%93present) For other countries, the same inclusion criteria will be used.
I will simply divide the number of fatalities by the total population (335M for the US).
People are also trading
I think this question isn't well chosen. Due to its design it will emphasize individual incidents in small countries. For a more accurate result, I think one should consider a longer time-frame.
For instance, while there hardly ever passes a year without a school shooting in the US (https://en.wikipedia.org/wiki/List_of_school_shootings_in_the_United_States_(2000%E2%80%93present) ) , there were 5 school shootings in Austria in the last 50 years (https://en.wikipedia.org/wiki/List_of_school_shootings_in_Europe) - one of which happened this year.
I don't think the US can surpass Sweden this year
https://edition.cnn.com/2025/02/04/europe/orebro-sweden-school-shooting-intl/index.html
It's equivalent to 160 casualties in the US, around 3x the highest from any of the previous years.
10 killed apparently, twice the initial report
@nathanwei Maybe they only classify countries, and not zionist entities
...(don't hate, joking, I like Israel very much!)
