How do I praise my child correctly?

By the way: the question of whether a child should be rewarded is also a valid one. Fabian Grolimund answers it.
This is the 3rd part of the video series «Learning with children». The video series by psychologists Fabian Grolimund, Stefanie Rietzler and Nora Völker, produced in collaboration with the Swiss parents' magazine Fritz+Fränzi, is a seven-part series on how to support children with their homework and motivate them to learn at school. Regardless of whether they are still struggling to concentrate or have received a bad mark: The little bunny, Fabian and his team, show how to deal with difficult learning situations.
All parts of the series «Learning with children»:

• Teil 1: Vier Wege aus dem Hausaufgabenfrust
• Teil 2: Konzentrieren für Anfänger
• Teil 3: Wie lobe ich mein Kind richtig?
• Teil 4: Merktipps für helle Köpfe
• Teil 5: Der richtige Umgang mit Misserfolgen
• Teil 6: Wie motiviere ich mein Kind richtig?
• Teil 7: So wird ihr Kind selbständiger