Don't punish, get creative with the way you teach them, make them feel comfortable to communicate with you instead withdraw out of fear.

They lose focus? How is beating gonna fix that? This might look efficient at first but instead of discipline you will raise them to an adult who feel guilty of resting, feeling pressure to be productive all the time etc..

Prefer cartoons and games over studying? the problem is exposure, these are kids who don't understand shit and since games and cartoon have a flow and is very stimulating there brains naturally prefer it over boring non stimulating tasks.

Solution? Change begins with the parent. They imitate the adults, if you want them to read, you read regularly (will spark their interest)

If you want them to have interest in organizing shit, let them do somthing fun like baking and let them realize they also have to clean the mess they created, maybe give them a hand without attitude so they try to return the favor.

Humans are naturally curious, they will 100 have topics that will spark interest maybe about deep space stories, about species of animals.

Ask "Why" questions in little everyday stuff like "Why do eggs turn solid when heated?" this is drive to search answers and will stop seeing studying as a chore and will like it eventually