Excuse me, I have something that I’d like to tell you - do you have some time now?
Did you read the notice from the school already?
I have some bad news. Someone broke into our home last night and stole all the ice cream we had stored in our freezer.
This is a strange word, so you'll have to bear with me. You know that 知 means know. But in the case of this word, what do you know? Look at the second half. らせ sounds a bit like "race." So, you know about a "race." How do you know about this race? You got a notice or notification about it.
Remember 知る? This is the same reading (し). So, if you know that, you'll be able to read this one as well.