Students use Hudson River salinity data to create a line graph that shows the location of the salt front, and use math skills to explore how this location varies over time. They use the graph to estimate the location of the salt front...

Students discuss definitions of estuary, salinity, and the salt front. They listen as the teacher explains the Hudson River Miles and ways the upriver and downriver sections relate to the north and south. Students graph the salt front...

Pupils study Archimedes' Principle, flotation and the reaction of buoyant forces and explain the relationship between density and flotation.

Students study the origins of pecans and complete a bar graph from the data they have discovered. For this pecan lesson plan, students draw pecans, discuss a pecan time line, and draw a bar graph comparing Arizona pecans to other...

First graders make ice cream and determine what makes this liquid turn into a solid.

Second graders investigate sodium content in the foods that they eat.