Provides a directory of lessons organized by the California Science Framework for K-12. California's framework for curriculum standards is similar to the national standards for science, as well as standards in many states.
Provides lessons by grade level that strengthen critical thinking. Provides an original lesson and then a lesson remodelled using a critical thinking focus. (See the Remodelled Lesson Plans that are listed by grade level.) 3-00
Provides almost 300 individual lessons. Specifies a general grade level for each, such as elementary. The quality of lessons varies widely and some only announce the availability of lessons on a topic. 5-00