Learners examine the function of each part of a microscope and follow step-by-step instructions on how to focus on a specimen. They also review the proper use and care of a microscope and test their knowledge in two drag-and-drop exercises.

Learners read about endospores and view video clips demonstrating spore staining procedures. Correctly stained slides are shown.

Learners view video clips demonstrating acid-fast staining procedures. Correctly stained slides are shown. The learning object includes two matching exercises.

Learners view video clips demonstrating Gram's staining procedure. Correctly stained slides are shown.