A diary

最終奧義

1. spelled wrong
spelt wrongly

I think it might be better if you use "Spelt incorrectly"

and by the way

I started going to school by riding bicycle and I knowed that her home was located at the same direction with mine.

This sentence can be said in another way which might look better

I started riding bicycle to school and I knew that her house is at the same direction as mine.

Watch the tense you used, her home "was located" at the same direction with mine

If I'm right, her house is still in the same place right?

If so, then there's no way you use past tense

As artifact had pointed out, use "is" instead of "was" is much better

最終奧義

如果我沒記錯的話, cram school 應該是補習班或是課後輔導班

跟tutorial lesson有點類似....