Geez, this guy....

If your three year old is getting upset by getting a math problem wrong then the problem is that you are attempting to teach arithmetic to a three year old. With flashcards. You need to step back and focus on the basics first, and stop insulting every person who is telling you this.

Edit: I realize that somebody, probably elenbarathi, is going to link me to this piece: http://www.inference.org.uk/sanjoy/benezet/three.pdf

Don't bother, I already linked that dude to it, to no avail. He called me "stupid". I feel I deserve a higher class of insult than that.

Pandia Press is offering a free pandemic unit study

https://www.pandiapress.com/wp-content/uploads/Pandemic-Unit-Study.pdf

I haven't looked over this particular curriculum yet, but their general science and history materials are secular.

Your child can become an astronaut and explore space from home with NASA

https://www.cnn.com/2020/04/08/world/nasa-space-station-stem-activities-scn/index.html

(no subject)

( Covid links )