The following is from dpreview - I haven't checked it out myself yet.
The Professional Photographers of America (PPA) has announced it’s unlocking all of its more than 1,1000 online photography classes for the next two weeks as a way to help those who are quarantined amidst the COVID-19 pandemic.
On the sign up page to access the free classes, PPA says:
'Times are tough - we need to be at our best. More kindness. More patience. More giving. And we at PPA want to pitch in to make things a little easier. What better way to spend your time at home than preparing your business for when things kick back into high gear? That’s why PPA is opening ALL of our online education to ALL photographers and small business owners worldwide for the next two weeks.'
To access the more than 1,100 classes, all you need to do is sign up for a free account on https://www.ppa.com. There, you are asked to enter your first name, last name, email, a password and the city, state and country you reside in. Once the account is created, you’ll automatically be sent to the page shown in the screenshot below, from where you can choose the class(es) you want to partake in.