Draw a circular chart showing the name and chemical breakdowns for each of the nine Krebs cycle steps.
Read through the list and put the steps to music. You can use any simple melody such as London Bridge or Twinkle Twinkle Little Star.
Sing the song seven to 10 times, looking at the chart.
Try singing the song without the chart. You may need to cheat at first, but you'll have it memorized in no time.