Presents an activity for students to investigate equal parts and area and the connection between area and fractions. Highlights the importance of such a lesson in which children explore rich mathematical ideas, share their thinking and their work with one another, and make connections to other mathematical ideas. (ASK)

Presents a discovery lesson in which students investigate the limit of angle measures formed by repeatedly folding a strip of paper. (KHR)

Presents a daily group activity of writing equations to assess children's mathematical thinking and progress on a regular basis. Argues that this approach is one way to foster a close relationship between instructional activities and ongoing assessment. (ASK)

Using the children's book "Tops and Bottoms" by Janet Stevens--an adaptation of the classic fable of the Tortoise and the Hare--students are given opportunities to build connections between a problem-solving situation and mathematics and to communicate solutions through writing, symbols, and diagrams. A key concept is to demonstrate to students…