This classroom activity will show students that there is a lot we don't know about science, for example life throughout the universe. It will hopefully encourage students to question what we know and don't know, and exploration and study of the unknown.

Cluster of questions on acid rain deposition.

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The United States was founded on the principles of natural rights, equality, and classical republicanism, but how well did it actually live up to these ideals? In this lecture, Professor Rob McDonald of the US Military Academy at West Point describes the conflict between the ideals of the American Revolution and the unfortunate realities of the time.

After using the historical development of concepts of conserved motion to develop introductory understanding, students are directed to a series of activities to gain a better understanding of momentum, conservation of momenta, angular momentum, and conservation of angular momenta.

This example Socratic questioning page provides an outline for leading a classroom discussion regarding whether or not nanobacteria exist. Sample questions, resources for background information, and tips and assessment information are provided.

This example Socratic questioning page provides an outline for leading a classroom discussion regarding whether or not viruses are alive. Sample questions, resources for background information, and tips and assessment information are provided.

Sample Socratic questions and answers regarding the biosphere.

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This course is an introduction to economics for non-majors and political economy, with an emphasis on the moral and ethical problems that markets solve, and fail to solve. Taught by Professor Michael Munger of Duke University, this course includes full length lectures, links to readings, and a sample final exam.

The first page of the presentation includes photos of 12 animals. I print this page, cut up the photos, and give a set of photos to each group of students. Working in groups of 2 or 3, the students spend ~10 minutes arranging the photos to depict the evolutionary relationships among the animals. This exercise is followed by 4 clicker questions about relationships that students commonly misconstrue due to convergence or shared primitive features. I use the clicker questions to initiate class discussion of group results. Then we discuss the evidence (anatomy, biochemistry) for current thinking about these relationships. Once we have established a consensus, students are asked to place pictures of a subset of the animals at the tips of the branches on a pre-designed cladogram. The activity gives me insight into students' preconceptions regarding vertebrate phylogeny, encourages students to identify their own misconceptions, promotes peer instruction and highlights problems associated with determining relationships based on shared primitive features. Placing the animals on a pre-designed cladogram allows students to translate their hypothesis about relationships into a visual diagram, an exercise that I hope will help students to extract the phylogenetic hypotheses depicted on cladograms in papers and textbooks. Once we have established a consensus cladogram, students must go one step further and add evidence (synapomorphies) to their cladograms. Students spend ~ 10 minutes brainstorming with their group to place synapormorphies at each node of the diagram. An example is provided for whales and hippos, groups for which the evidence of shared ancestry is difficult to recognize based on the anatomy of living specimens. After adding synapomorphies to their diagrams, students will work together as a class, contributing shared derived features to a group cladogram. If time permits, it would also be possible to complete the exercise with a gallery walk, where each group posts a copy of their cladogram + synapomorphies on the wall for other groups to examine and edit.

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This activity is a field investigation where students gather leaves from various trees on school property, interpret findings, name tree and leaves, journal activity and develop a new "aha" for nature!

Three in-class lecture demonstration questions to test and build understanding of DC circuits are presented. These questions cover simple series and parallel circuits, and a more complicated circuit that is fundamental for understanding this topic.

These are interactive lecture-demonstration questions probe student understanding of fundamental concepts in the photoelectric effect.

Conceptests are single item multiple choice questions given in the middle of a lecture to assess students' learning of basic concepts. Because Conceptests are projected during class, it is relatively easy to include snippets of data. Students' understanding of the target concepts can then be assessed based on how well they interpret the data rather than how well they answer verbal questions. The Conceptests on this website use bathymetric data from mid-ocean ridges (MOR's) and test students' understanding of MOR volcanism, plate motion direction, seafloor aging, and sedimentation.

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This series of instructional videos was created by Camosun College for a Canadian edition of the OpenStax "Concepts of Biology" open textbook as part of the BC Open Textbook Project. The lectures are taught by Charles Molnar, a Biology instructor at Camosun College. The videos are accompanied by transcripts.

Conditioning affects an animal's behaviour. Learn about classical and operant conditioning in this GCSE / K12 Ecology video from the Virtual School.

An interactive lecture in which students use data on feeding habits and habitat, skeletons, and DNA sequences to draw phylogenetic trees.

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An interactive lecture in which students use data on feeding habits and habitat, skeletons, and DNA sequences to draw phylogenetic trees.

This write-pair-share activity for Calculus II students involves a hypothetical hemispherical loaf of bread with a 12-inch diameter that has been sliced into twelve one-inch-thick slices. The objective is to determine which slice contains the most upper crust (i.e., most area of its surface of revolution).

In class, have students make a simple sketch of an outcrop shown in a slide (or computer projection) then discuss possible interpretations.

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