@Sofiabella the thing is, it absolutely can happen , especially in schools with blanket rules/policies and that punish a lost/forgotten calculator the same as bullying or violence .
For example, a set number of detentions (6 in a term at one school) is automatic suspension for a day. However , when detentions are given for forgetting your calculator (even if you don't need that day), not having a reading book for mandatory free reading sessions, no compass/rules , going the wrong way in the one system etc (as well as more serious incidents/disruption) it's not that hard to add them up , especially for struggling kids. Even for good kids , but it's easier for them to keep the number low. The school the. needs to now apply the 6 detentions = suspension the same way to the scatty kid as they would the school bully.
Of course, in either case it's not for nothing, but some things are more nothing than others.
Second day of spring 2, 85 kids in DD's year group (y7) had lunchtime detention for lack of some equipment or other.85 out of 200 odd. They had to do it outside as no classroom was big enough. Plenty more from other year groups as it was a whole school check. For some it was their first one, for some their 4th or 5th, for some their 6th so they got a suspension on top too.