Before, During and After Class Learning Cycle Activities

Michael R. Abraham

Department of Chemistry and Biochemistry

The University of Oklahoma

Norman, Oklahoma 73019



John I. Gelder

Department of Chemistry

Oklahoma State University

Stillwater, Oklahoma 74078



Thoms J. Greenbowe

Department of Chemistry

Iowa State University

Ames, Iowa 50011


The Before, During and After Class Learning Cycle Activities is an NSF supported materials development project designed to produce sets of “before”, “during”, and “after” class meetings that use an inquiry oriented instructional strategy (the Learning Cycle Approach). These activities for before, during, and after a particular class meeting are linked together and address specific learning objectives for the course.

Download BCEs and ACAs compatible with Desire To Learn (D2L)

Indicate an interest in using BCEs and ACAs Fall 2011 and Spring 2012

Links to Examples

Introduction to Matter Example (Under Construction)

Before Class Exploration (BCE) Expert's Response Page

During Class Invention Worksheet (DCI)

DCI and Clicker Questions (Annotated PowerPoint slides)

After Class Application (ACA) Expert's Response Page

Optional Materials

Water Movie and Alcohol Movie

Clicker Questions with videos

Clicker Questions

Density Activity (under construction with PhET)

BCE (based PhET simulation)

DCI and Clicker Questions (Annotated PowerPoint slides)

ACA (based PhET simulation)

DCI Worksheet

New PhET Simulation

Stoichiometry Example (under construction)

BCE on Chemical Equations

DCI on Chemical Equations

PowerPoint on Chemical Equations

Clicker Questions on Chemical Equations

ACA on Chemical Equations (under construction)

PowerPoint Slides

Notes on Stoichiometry set on Chemical Equations

BCE on mass/mole relationships

Second DCI Stoichiometry (this is in a powerpoint that Mike is developing. want to invent the , use the data from the BCE to generate the idea, scafold through a calculation to show the conversion from grams to moles has to go through the molar mass of the compounds. want to show that the equation reads in moles, but in the laboratory we have to make measurements in grams so we have to use a conversion to make everything useful. also see that the change is important in the calculation. no relationship between reactants and the stoichiometry of the balanced chemical equation.)

ACA on mass/mole relationships (the other combustion reaction from Tom's site)

Notes on Stoichiometry2 set

old BCE for Stoichiometry

old DCI for Stoichiometry

Calorimetry Example (Activities to introduce the relationship between heat, temperature, amount of substance and to invent the concept of specific heat for a pure substance.)

BCE for Calorimetry

DCI for Calorimetry

ACA for Calorimetry

Instructor Clicker Questions

PowerPoint Slides

Specific Heat Example (The activity shows a video of an experiment to measure the specific heat of a metal. In the activity the experimental data is collected to determine the specific heat.)

BCE for Specific Heat

DCI for Specific Heat

ACA for Specific Heat

PowerPoint Slides

Atomic Structure sample (In this activity Coulomb's Law is discussed and used to understand ionization energy data to develop a model of the electron in atoms.

BCE for Atomic Structure

DCI for Atomic Structure (Shells and Subshells)

ACA for Atomic structure

Electron Configuration (under construction using a Flash animation)


Electronegativity/Ionic Bonding/Polarity




VSEPR (NSDL Journal page : MRA and JIG Jmol Page)

Gas Laws I




Clicker Questions

Gas Laws II (Effusion)


Intermolecular Attractive Forces (under construction with Pearson Publishing)

Solid State

Shifting Reactions A

BCE for Shifting Reactions A

DCI for Shifting Reactions A

ACA for Shifting Reactions A

Shifting Reactions B

BCE for Shifting Reactions B

DCI for Shifting Reactions B

ACA for Shifting Reactions B

Instructor Clicker Questions for the During Class Invention

Extent of a Reaction

Macroscopic Example

Exploration (do response page)


Instructor Clicker Questions for the During Class Invention


Application Part 1

Application Part 2

Application Part 3

Mechanism Example (Activities as part of an introduction to a unit on kinetics to provide students with a more detailed perspective of a balanced chemical equation. A more detailed discussion of mechanism would be provided at the appropriate point in the unit. These activities are intended to serve only as a conceptual introduction.)

Before Class Exploration (BCE) for Mechanisms

During Class Invention (DCI) for Mechanism (Link to a simulation file for the DCI)

After Class Application (ACA) for Mechanism

Instructor Clicker Questions for the During Class Invention

Catalyst Example (under construction)

BCE for Catalysis

DCI for Catalysis

ACA for Catalysis

Link to additional Examples

Examples with particulate level models

Characteristic of Acids (Strong and Weak Acids and Bases) BCE3.1








Buffer Videos BCE4.1

Video1 Video2 Video3 Video4 Video5 Video6 Video7 Video8

Redox Part 1




Project Video:

Anode Particulate Electron Flow and Oxidation

Particulate Electron Flow in the Wire

Cathode Particulate Electron Flow and Reduction

Complete Movie

A 2nd Video

Phase Change Simulation

Original ACAs After Class Application (ACA) Expert's Response Page

ACA Questions from students

Link to additional information (This is Word file that will be downloaded to your Desktop.)


Tom's Simulations

Simulation #1

Simulation #2

Simulation #3

Simulation #4

Simulation #5

Simulation #6