While a gun-free school may seem like an ideal solution, it may not be practical. For instance, what happens when a criminal enters the school with a gun?

No other nation has this problem in the first place, so perhaps we should do something about that, given that it's literally the root of the issue.

In fact, there have been cases where armed resource officers have prevented school shootings.

Just as there are, and have been, a plethora of situations in which a shooting occurred at a school with armed security, and even with police officers on scene...clearly the security is not a working solution, nor does it even bother addressing the root problem to begin with.

Furthermore, gun-free zones are often targets for shooters, as they know there will be no resistance.

Actually, despite that all sounding intuitive, studies show the opposite. For example, here's an excerpt from a study published in 2021 by the US Department of Justice (https://www.ojp.gov/ncjrs/virtual-library/abstracts/presence-armed-school-officials-and-fatal-and-nonfatal-gunshot):

"However, the data suggest no association between having an armed officer and deterrence of violence in these cases. An armed officer on the scene was the number one factor associated with increased casualties after the perpetrators’ use of assault rifles or submachine guns. The well-documented weapons effect explains that the presence of a weapon increases aggression. Whenever firearms are present, there is room for error, and even highly trained officers get split-second decisions wrong. Prior research suggests that many school shooters are actively suicidal, intending to die in the act, so an armed officer may be an incentive rather than a deterrent. The majority of shooters who target schools are students of the school, calling into question the effectiveness of hardened security and active shooter drills."

What do you think would be the best way to ensure the safety of students and staff while still respecting the Second Amendment?

Easy: national gun control, which has successfully and empirically worked in every single nation that institutes it, and is also the only Read moresolution that has ever proven objective results. National gun registration, background checks, mandatory training and licensing and insurance for each class of gun, etc...all of which are bare-minimum common sense gun laws that don't even require any kind of gun bans, and would even further protections for the responsible gun owners.