Introduce the lesson. Welcome students and explain that today we’ll explore what happens to germs on our hands. Emphasize curiosity and participation.

Pose the guiding question to activate prior knowledge. Record student responses on the board for later reference.

Show the image of a hand washed with water only (e.g., glitter still clinging). Explain that water alone can rinse away dirt but can’t break the oils that hold germs.

Display an image of soap lathering on the hand and removing glitter. Explain at the macro level how soap lifts away particles.

Use a simple diagram to show soap molecules (micelles) surrounding oil droplets. Label hydrophobic tails and hydrophilic heads.

Walk through each step slowly, demonstrating motions if possible. Emphasize a 20‐second scrub and thorough drying.

Transition to the Glitter Germ Experiment. Remind students to follow safety and record observations on their Lab Observation Sheet.