It may not be necessary to life but it can sure make life easier if you can grow some of your own food. Plus it teaches kids the benefits of hard work and patience, something that is seriously lacking by some these days.
Learning that is like learning to sharpen a knife, drive stick, and change oil. It's not necessary in this day and age but it's definitely something that would be useful eventually.
yes because to be honest - when am i going to need to annotate a book or the the square root of 900 - answer NEVER - when will growing food not only help me to live, but also help me help others - answer ALWAYS!!!
Everyone should learn how to grow sonething and add more green to the world