This article describes a lesson taught in a designated English Language Learner (ELL) classroom in an elementary school in Pawtucket, Rhode Island, using a sheltered instruction approach. Eighty one percent of the students at this school are from diverse ethnic backgrounds where 25 per cent of them receive ELL services. A variety of languages are…

The seasons are often modeled for students using two spherical objects, one representing the Sun and one representing the Earth. Solely using this model, however, neglects a critical aspect of learning--how students actually see the world. This lesson challenges students to explore seasonal variations as they create and analyze sunrise/sunset…

We have designed model-development sequences using a common context to provide authentic problem-solving experiences for first-year students. The model-development sequence takes a model-eliciting activity a step further by engaging students in the exploration and adaptation of a mathematical model (e.g., procedure, algorithm, method) for solving…