Martha and friends discuss what the words "certain" and "sure" mean, and Martha shares her version of how a game they played ended.
Martha and friends learn how gophers dig holes underground called burrows.
T.D. gives a report in class about the inventor of chewing gum, Tom Adams.
If Dr. Trumanstein's hypothesis is correct, the raisins in his oatmeal experiment will expand. However, he doesn't count on them expanding into a giant oatmeal monster!
Skits and Martha bake a cake for Helen.
TD imagines the future of an ever-increasing pile of garbage, named "Glog."
Helen helps her grandmother set up an email account and attach a file to her first email. Martha, however, does not approve of such things.
Carolina and Helen team up to measure and dress Martha and Skits.
Skits and Martha work together to define the word "previously."
Martha drums up an inventive means of transportation to get mom to the hospital on time.
Martha explains the meaning of the word "pressure."
Martha defines the word perspective.
Truman tells Martha about the story of Balto, and explains the meaning of the words, "serum" and "dog sled."
Helen reads her favorite childhood story to Jake and Martha.
TD is confused about the meaning of the word "dejected."
Martha and friends discuss what the words "certain" and "sure" mean, and Martha shares her version of how a game they played ended.
TD tells Jakey a story he wrote about Martha.
The kids try to brainstorm ideas for how to clean up the litter in the park, and inspire other kids to be more aware of litter.
Professor Monkey follows instructions to make a paper airplane, but accidentally uses paper that has the directions for where he needs to be!