I have heard this remake a few times and it always made me want to correct the person saying it!No your not homeschooling a toddler or a preschooler you are just teaching them.
I think there is some kind of a difference, it's very common for infants/toddlers/preschoolers to be at a library story time, playgroups, learning . Then at age 5, most of those kids are enrolled in kindergarten, and the others whose parents choose to teach them at home are home schooled. Wouldn't it be odd if the parents who enroll their kids said they home schooled for five years?
On the other hand there are some families who decide to home school their children much before the kids are school age and they want to plan and implement a home school program for their young kids.
Generally speaking (YMMV) you can start the term,"homeschooling" at the age a child is legally required to go to school and doesn't include preschool or pre-K activities!It's really not a very big deal but it sure is annoying when people say that!I'll get off my soap box now.