A 49 second video that teaches you how to teach your child the correct pencil grip and grip firmness. This is were a lot of students begin to go wrong.
When I start working with a student on handwriting remediation, correcting grip is usually the first few lessons, and we keep returning to it as necessary.
Have your child correct the grip, and then do nothing more than tally marks |||| for a number of repetitions. Depending on the child, you can have the child make 5 tally marks, do the pencil-flip trick, and do 5 more, working up to 100 repetitions a day.
Often kids' hands get sore from this new (correct) form of grip, so monitor the child's comfort.
You can also mix things up with either repeated letter forms: c c c c c c or o o o o o.