"". So what do you do then when for example, your 4 year old refuses to get ready to go to school, or starts to tell lies, or when your 3 year old keeps on hitting his brother and refuses to stop when repeatedly told not to, or your two year old bites you? ""
Two year olds bite, sometimes until they can communicate better, so gentle restraint and showing that I was hurt, then modelling wanted behaviour, is all you can do.
As well as recognising triggers and stopping it from building, but they will still occasionally bite.
It sounds cliche, but modelling good/wanted behaviour from day one, does make a difference. This includes how we talk about others, treat others and communicate.
Three year olds don't have empathy, so some punishment is necessary, time outs aren't damaging for a three year old, I just didn't use them.
Reward and praise work.
For the four year old, reinforcing the positive spin of being on time means that we don't miss out on being with our friends and what they are doing. Build a sense of pride for being on time and reward the change. There are days when a four year old is going to lag, if it's a one off, ignore and hurry them along. If they like their teacher, put it to them that she will be disappointed in us not being on time.
Four is an age when they start to build empathy, but it is only developing.
Four year olds do lie, it depends on what's being said.
I was a LP and I used to get my children to help from the POV that life inside our home was much better for all of us and when we were organised we got to do fun things, because we had time.
It gets laughed at, but you do see the difference in adults that have been bought up in positive, nurturing homes.