It's official, Mary is a Mathlete and Caroline will be a chaperone on a trip to Minneapolis to partake in a Mathematics Championship.   Even though she is happy/excited for her sister....Laura is having to deal with a case of the Green Jellies:  Her feelings of jealousy towards Mary's achievements. However, Charles decides it is time to let Half-Pint Level-up, help more around the house, and give her some much needed attention.  These two sisters are stepping into unfamiliar territory.  Will Mary's nerves get the best of her during this trip and test?  Why does Laura feel she has to always compare herself to her sister and mother?  How much weight did Charles actually put on while Caroline was away?