This is how to get to the post office!
これに挑戦してくださった生徒さんがいました～！Good for you!!! このブログ誰か見てくれてたんですね(;O;)
I would explain how to get to the post office like this:
You go straight ahead until you see a street on your left. You'd want to turn left. Then you will hit a school. And then you'd want to turn right in front of the school. When you see a pet store on your left hand side, turn left. There is a cafe diagonal to the pet store. Turn right at that corner. Finally, you will see a post office next to the cafe.
In front of～：～の前
When you see～：～が見えたとき
Left/right hand side：左（右）側