Please use inches or centimeters, not "silver dollars" or other coins, to describe the size of spiders!
To identify spiders, you can't just look at 10-12 pictures! There are 50,000 species to choose from, separated by picky microscopic details.
The oft-repeated "spiders don't stick to their own webs thanks to oil on the feet" is wrong — the story is much more complicated.
Books say spiders don't eat solids but "suck the juices" of their prey. False! All spiders digest solids externally with vomited enzymes.
Despite "common knowledge," the nearest spider could be hundreds of meters away—or right under your feet. It depends!
In late summer when people notice garden orbweavers and giant house spiders, most native spiders are juvenile.
It's easy to tell males from females, so please don't call all spiders "he" or "him."
Spiders very rarely bite humans, but that isn't because their fangs are too small; most could bite if they tried.
"Daddy-longlegs" means harvestman (not a spider), crane fly (an insect) or pholcid spider, depending on who's talking! So it's really meaningless.
Orb (spiral) spider webs are neither the most common type nor the "normal" or standard type of web.
All spiders make silk but only about half make a web (silk structure to catch prey); others hunt or wait for prey.