How to identify Sugar Maple trees vs Silver, Red and Norway Maples (Leaves and keys)

Eastern USA Maple (Acer) identification. Lots of people get them confused but if you want the best trees to tap for Maple syrup, go with Sugar or Black maple. You CAN tap the others though, but they may not be as productive. Different maples also have different properties of their wood, shade, and growth form. There are even hybrids - Acer x freemanii.
Also, Canadians come get your maple trees straight. ;)