Your English is okay, you used initial caps after a colon for a sentence that is a dependent clause. 'It was not anything' needs help. Team time, should probabl

Your English is okay, you used initial caps after a colon for a sentence that is a dependent clause. 'It was not anything' needs help. Team time, should probably be team-time. Proofing is reasonable, though you missed the 'grammar of' which I assume should read 'grammar or', then the education should not be pluralised. I don't disagree with your point though :)