Properties of Matter STEM Unit | Rock Museum Project for Grades 4–5 Looking for an engaging, hands-on way to teach properties of matter and connect it to math and STEM skills? This STEM Unit for Grades 4–5 has everything you need! Students will become geologists and museum curators as they design and create their own rock museum exhibit. Along the way, they’ll investigate the properties of matter, practice critical math skills with perimeter and area of irregular figures (including unknow