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David from Thomas Reade School sent in the following solution:

The shortest route is forward $1$, right $1$, forward $6$ and right $3$ which is $11$ spaces.
Another way is forward $1$, right $4$ and forward $6$ which is $11$ spaces.
Another way is forward $3$, right $4$ and forward $4$ which is $11$ spaces.

(This assumes that Moira is standing just outside the school gate and finished standing outside the school doors.) Thank you David.