Today's new word for me 2

  I corrected testing sheets for the high school entrance examination today.  I found that I should have studied "english education in junior high school."  I din't know that our students had already learned the sentence form, "the one that someone do" before their career in high school.
  It's true that people forget things they learned but I didn't know the fact and failed to make use of their knowledge buried in their brain.  It's a pity!!