Junior geologists sort rocks and soil. They separate a sample of river gravel by size, shape, color, and other characteristics. To include Common Core standards, you could have little ones graph the number of particles in each sample.

Fourth graders work in small groups to sort and classify a variety of objects. They develop criteria for sorting and explain the characteristics they chose for classification. Groups record and share their classifications.

Students identify the length of an inch. In this measurement lesson, students read Inch by Inch and predict how many inches long various objects are. Students practice measuring the objects by using an inch ruler.

Pupils observe liquids in different containers and then explore the concept that liquids have level surfaces. They identify those who are not at the center to reinforce the concept of liquid levels with a representational puzzle and...