I would praise my child for her hard work but not reward her with something. I don't think is a wise choice to reward her when she gets full marks. They will end up doing things to impress and not doing things for themselves. Children might not be able to accept failures too because they might think that they must get full marks if not it is the end of the world. 

I would reward but not all the time and it’s not only material gifts. It could be an experience to the adventure park my child wants to go or buy her something she wants to eat

Yes, we reward them will small things that make them happy and also give them recognition

If he/she is consistently good, I’ll accumulate it to reward them with something bigger

Sometimes. It will encourage them to learn and study although they deserve it

Yes! Shower them with praises and it will give motivation to work harder.

As long as it promotes the right behavior and attitude towards learning

When they have worked hard and made good effort...it should be awarded

Why not? No need full marks As long as there is improvement

its good to recognise their effort & to cheer them on