LeftSide-RightSide is a Wisconsin-based educational game company that makes games for children and young adults. From their website:
"We’re adamant about providing accessible educational materials that are fun, and that encourage critical thinking, rather than the collection of dull facts lacking in context and relevance. Learning (and retention!) happens naturally when players engage with the material, and play through it multiple times."
LeftSide-RightSide emphasizes 'whole-brain learning', which, as they put it, involves tying cultural knowledge to facts by using jokes and puns.