I am shocked by this behavior!

I am a teacher in Canada and have taught primary for about 10 years. Never would I have guessed in this day and age that they would treat a 9 year old like this.

Do not send him back to that school until you have met with the principal and received an apology directly to your son from ALL the adults involved. Whoever supervises the administration of this school must be notified all well.

To punish a child for the actions of an adult are ......

There are no excuses for this behavior.

I have seen kids come to school without lunch many times. At my schools the teachers will donate some of their own lunch for a hungry child if we can't get ahold of their parents.