It’s kind of hard to give advice when we don’t know what specific behaviour he does that you don’t want. What do you do when he misbehaves? Is there anything new in his life of any big changes? I have a 5 year old and he is definitely pushing more boundaries the older he gets and is starting to get a bit cheekier. Also I’ve found that it’s the end of term and he’s a bit burned out and ready for the summer holidays. That’s the same for a lot of the kids in his class. My inbox is open if you want to chat about specifics. 5 year olds were definitely sent to try our patience though!
Look into the limbic leap x