I'm definitely not a parent, but the best things I'd do are among the following
Shielding their eyes from things on the internet, such as adult sites, etc.
Keeping a nice sleep schedule both to calm me and he/she down for school.
Keeping up with their basic needs such as food, water, shelter, etc.
Teach them respect through anyway (except for disciplinary esc action).
Although exercise is the best way to do that, there are other ways.
Practice controlled breathing exercises, which are easy to do from the comfort of your home.
One is where you take a few small breaths in and one large breath out. Keep doing this.
Breathing exercises are also relatively easy to find on the internet.
D. Securities and exchange commission
This is not really a question.