From my experience so far every year my dd has been at her school each of the above - marking, homework, discipline has been done totally differently by each teacher.
Last year it was two stars and a wish for marking schoolwork, just when the kids understood this, it's gone (now just comments)!
We've had rainbow/stormclouds, then green walls and house points for behaviour.
Frequency/type of h/w changes from one teacher to another also.
There seems to be little similarity between years and it takes several weeks at the beginning of the academic year for my dd to "get" the new systems. It also changes mid year too sometimes..
Is this how other schools are?