# But so that we do not cause the tax collectors to stumble

"But so that we do not cause the tax collectors to think that we do something that is very bad"

# throw in a hook

Fishermen would tie a hook to the end of a string and then throw the hook into the water to catch fish. 

# a shekel

a silver coin worth four days' wages 

# for me and you

Here the word "you" refers to Peter. Each man had to pay a half shekel tax. So one shekel would be enough for Jesus and Peter to pay their taxes.