In this issue of the free online magazine, Beyond Penguins and Polar Bears, explore what the polar regions can teach us about the water cycle and the states and changes of matter. Find lesson plans about the many forms of water, ice, and snow found in the polar regions and how to use science notebooks to integrate literacy and science.

This issue of the free online magazine, Beyond Penguins and Polar Bears, explores how elementary teachers can move from a study of the weather at home to the weather of the polar regions through hands-on activity, reading, and discussion.

This one-page article by the NRICH team reports on the history of the measuring of weight/mass. It is an attempt to provide material and ideas for lessons that address the disciplines of history and mathematics. Topics covered include weighing by comparison, the need for standard units, and weighing methods in various cultures. Questions and suggestions are provided for further research by students.

This problem provides a context in which pupils apply their knowledge of number properties and practice explaining their reasoning. Students decide which of the eight clues provided are necessary in order to determine a specific number on a 0-99 grid. The activity includes teacher notes, hints, sample solutions, a printable pdf of the problem, and a link to a more accessible related problem.