Presents an activity integrating mathematics and science intended to introduce students to the use of metric measurement of mass as a way to increase the meaningfulness of observations about variables in life sciences. Involves measuring the nutrient tolerance of algae. Contains a reproducible algae nutrient graph. (Author/MKR)

Presents two multiple-lesson activities that integrate science and mathematics. Lessons involve hands-on activities for grades 4-5 to develop the notion of average around building a racer; and accurately estimating and measuring crystal growth in grades 8-12. (MDH)