Use a "linkage strip" to build triangles with different side lengths. When you build a triangle, see if you can deform it into a different triangle while keeping the side lengths the same.
Count the number of raisins in seventeen half-ounce boxes of raisins. Then come up with a solution to determine how many raisins are in Brand X's or Brand Y's box of raisins.
Look at patterns of solids made with Cuisenaire rods. Make a table of the surface area and volume for each term of this sequence and view graphs of your data. Find the rule for the nth term.
Is there a relationship between the volume of a sphere and the volume of a cylinder of equal diameter and height? What about the volume of the sphere and the cone?
Using three sets of data from a second grade class, think of an aspect of the data you would like to focus on and then choose the type of graph (line plot, stem and leaf plot or histogram) that best represents that aspect.
Students need to cover 24 boxes with decorative paper. Observe as they use geometry and measurement to determine the area of one box in order to estimate the total amount of paper needed.
