I cant find it! I wish I could. I found some more generic articles about how beavers work, but not including behavioral analysis of the parenting tactics. Within any animal culture (including humans), the way we teach skills will contain some localized techniques. There have been more specific studies done with this in bear populations.

https://www.beaversolutions.com/beaver-facts-education/beaver-behavior-and-biology/

http://resp.llas.ac.cn/C666/handle/2XK7JSWQ/213152 Interesting ties between beavers and climate change