you dont have to use a naughty step....
removing them from whereever you are can work too... ie the hall / utility room / or ANY other room / area where they are away from everyone else. (It doesnt have to be 'in here' and can be, 'not allowed in here')
(at toddler group / park etc when out and about strapped into buggy facing the wall / away from everone else will do too)
This is what i would do:
So for hitting what do you do?
I would say no hitting, if stopped, quick sorry and move on, if did again say if you hit again i will [insert what you will do to remove him from situtaion]. If he does it folow through.... leave for a minute or 2 and ask to aplogise an to come back and agree to not hit & be nice
Spitting (though this is infrequent and really he only does it when his sister does as it makes her laugh) - but he will do it when we're telling him off.
Id ignore, he will get bored when you dont react and continue to only tell off
Shouting at us, intelligibly, when being told off.*
I would ignore, would stop telling off and would continue telling off once quiet, repeat as above until he stops shouting over you"
Chucking his toys around.
make him pick them up, "can you pick that up please, its not nice to throw", if he doesnt say 'mummy wil take it away', if he still doesnt confiscate toy for rest of day, or until next nap, if he keeps throwing keep doing above and taking away, he will get the message soon, once he knows you dont throw toys, and toys will be taken away, if thrown aggressively toy can be removed immediatly without warning
Demanding to be taken outside and played with and then having a total paddy when denied.
ignore
Kicking out during nappy changes.
ask not too, but just have everything ready and get it done asap... could he pass you a wipe perhaps
Scratching.
"No scratching, you need to say sorry" if he says sorry fine for now, if not take him away from situtation, full attention on scratched person / not him, for a few mins when back"
Belting his sister.
as for scracthing
Being unable to share anything with any other child and shouting 'mine' all the time, grabbing and snatching, pushing other children over..I could go on.
constant reminding and talking all the time about how we share, if he grabs /snaches toy returned to who had it, if he refuses to play nicely then he can be distracted to play elsewhere, point being if he will not play nicely then he doesnt play at all again will take time, but he will get the message, and when starting out oversee playing with other very closley with lots of praise and X's turn, Y's turn etc etc.. tediouse but will work*