Since we have the scale 1 inch = 6 miles, we can solve this problem with a simple rule of three:
[tex]\begin{gathered} 1\text{inch}=6\text{miles} \\ x\text{ inches = 12miles} \\ \Rightarrow x=\frac{12\cdot1}{6}=\frac{12}{6}=2 \\ x=2 \end{gathered}[/tex]Therefore, the school would be 2 inches apart from Robin's house on the map