They'd better take away pencils and pens, because they can be used to stab people.
They'd better remove all ring binders, because kids can squeeze each others' noses, fingers or genitals in the prongs.
They really should rethink having desks and chairs, because they can be thrown at other children.
Also, any neckties, belts, socks or scarves can be used to strangle others.
Lunchboxes? The hard ones are blunt objects and the soft ones can be stuffed into the victim's mouth or zipped over the head to suffocate.
Food itself can be stuffed into others' orifices.
Any bottles of liquid like water, milk or juice can blind someone temporarily or be used to hit them over the head.
Shoes? Blunt objects.
Shirts, dresses, pants... nooses.
The solution? Come to school naked, hungry and with no learning equipment. The teachers will like it. Stripping vulnerable children of any defense whatsoever has been the objective of government schools for quite some time now.
Like they do in some prisons, lets bolt or weld everything to the floor. Then we can hand out grease pens and circles of paper so no one gets hurt.