First-grade kittens can't walk over small animals when they eat fish. The topic that the kitten eats fish and walks in the grid is a first-grade math topic. Students are required to walk eat small fish in the grid, and don't cross small animals during this period. Learning originated from μ in ancient Greece? θξμα(máthēma) is a discipline that studies related concepts such as quantity, structure, change, space and information. It is produced by counting, calculating, measuring and observing the shape and motion of objects through abstract and logical reasoning.