Teacher script

Read the words after Say aloud. Show the cards as you go.

1. 5 min Why we wash our hands. Say: “Today we are going to be hand washing experts. Germs are tiny. They are too small to see, and they can make us poorly. Soap and water wash them away.” Ask: “When should we wash our hands?” Take answers: before we eat, after the toilet, after playing outside, after stroking a pet, after we sneeze or blow our nose.
2. 10 min Act out the 5 steps. Hold up the cards one at a time. Say: “Instructions in the right order are called an algorithm. Computers follow algorithms, and so do we. Here is our algorithm for washing hands.” Show and do: Wet (hands under a pretend tap) · Soap (press a pretend soap pump) · Rub (palms, backs of hands, between fingers) · Rinse (pretend tap again) · Dry (pat on a pretend towel). Say: “Doctors and nurses say we should rub for about 20 seconds. That is as long as singing Happy Birthday 2 times.” Do the steps again, singing Happy Birthday twice during Rub.
3. 12 min Task 1: cut and stick. Hand out the activity sheet and the picture cards. Say: “Cut out the 5 cards. Put them in order on your table first. When you are sure, stick them in boxes 1 to 5.” Ask as you walk round: “What comes first? What comes next? What comes last?” If a pupil is stuck, ask them to act out the steps again.
4. 8 min Task 2: Tedi’s mistake. Say: “Tedi the teddy wrote his own algorithm. Let’s act out his steps.” Point to each card and read it: Wet, Soap, Rub, Dry, Rinse. Act it out together. Ask: “What happens to Tedi’s hands at the end?” (They are wet and soapy again, and his towel gets soapy.) Say: “Finding and fixing a mistake in instructions is called debugging. Circle the 2 cards in the wrong place.”
5. 10 min Task 3: before or after. Read each line aloud and point to the pictures. Say: “Does Wet come before or after Soap? Show me with your thumb: up for before, down for after.” Agree before, then pupils circle it. Read the other 4 lines one at a time and let pupils circle on their own.
6. 10 min Task 4: how long? Say: “Let’s rub our hands and count to 20 together, slowly. Then colour 1 bubble for each number.” Count together, then give time to colour. Say: “Now look at each pair. Which takes a longer time? Tick it.” Read each pair aloud. Ask: “Is washing your hands quicker or slower than a whole school day?”
7. 5 min Say the steps together. Say: “Let’s say our algorithm with the actions: Wet, Soap, Rub, Rinse, Dry. Which step did Tedi get wrong? Remember to wash your hands before you eat your lunch today.”