Do the rest of the world a favor and teach your children basic manners! Please, Thank you, your welcome, no ma'am, yes ma'am. Respect for elders. NO ONE will want to be around your child if you don't. The fruit of the spirit. Teach them to be loving, joyful, peaceful, patient, kind, gentle, and to have SELF CONTROL!
I see so many students in trouble everyday who lack basic skills. And guess what in 6 years these students will be on the loose in grown up land and expected to fit into society. Don't reward bad behavior or mediocrity. Reward good behavior or going above the rest. Praise them when they do a good job. Reward verbally. Not with toys or possessions.
If you don't spank your children the rest of the world will want to.