Examples of Controlled Investigation are:
Types of project-based learning
-Determine the effect of various coatings on the
corrosion of a metal.
-Determine the effect of energy, such as light or heat,
on the growth of aquatic or land plants.
-Mimic the effects of acid rain on the environment.
Students can explore how liquids of varying
-pH affect the growth of plants.
-Determine the effect of soil samples from various
areas of their neighborhood on plant growth.