How Many Ships?

A fun lesson plan in cross-curricular division has learners exploring 18th century ships as well as dividing even numbers by 2. The class takes on the role of the Royal Navy, protecting merchant ships from pirates. They must count the masts on the horizon to determine how many two-masted ships they see coming. They discuss reasoning with partners, and share out their process and patterns they've noticed. Extension activities, a worksheet, and a ship diagram are available.