• Quick retrieval from earlier learning (Why we need light to see things). Students answer on mini whiteboards.
• Show answers together and note who needs support in the main task.

1. You go into a room with no windows and shut the door. The light is off. What can you see? (only shiny things / only red things / everything, but in black and white / nothing at all) → nothing at allPrompt: What is missing from the room?
2. True or false? If you wait long enough in a totally dark room, your eyes will see everything. (True / False) → FalsePrompt: Where does the light start, and where must it end?
3. A cat's eyes seem to shine in the dark when a car's headlights catch them. Is the cat making light? (Yes, cats' eyes are light sources. / No, its eyes are reflecting the headlights. / Yes, but only at night. / No, it is the Moon making the eyes.) → No, its eyes are reflecting the headlights.Prompt: Would the eyes shine if there were no light at all?

• Ask the class to make a wave with a rope or slinky and describe what moves and what doesn't.
• Share the objective: Dark means no light; protect your eyes from the Sun. Read the success criteria together.

• Work through the example out loud, saying why you do each step, not just what you do.
• Example: Why do sunglasses with UV protection help your eyes on a bright day?
• Step 1: UV-blocking lenses protect eyes from damage over time.
• Step 2: So the answer is: They block harmful ultraviolet light and reduce glare.
• Answer: They block harmful ultraviolet light and reduce glare.
• Pause after each step and ask a student to say what comes next.

• Do these together. Students try each step on whiteboards before you reveal it.
• Use the hints as prompts rather than giving the answer.

1. What is "dark"? (a kind of black light / a gas that fills rooms at night / the absence of light / a shadow from the Moon) → the absence of lightPrompt: When you switch on a lamp, what happens to the dark?
2. True or false? You cannot get sunburnt on a cloudy day. (True / False) → FalsePrompt: Think about how light reaches eyes and skin.

• Students work on the student sheet. Circulate and check the first two answers of every student early.
• Students who finish: write a question of their own for a partner, with the answer.

The 8 questions are on the student sheet below, with answers in the key.

• Two questions on their own. Sort answers into got it / nearly / not yet to plan the next lesson.

1. True or false? Sunscreen protects skin from ultraviolet (UV) light. (True / False) → TruePrompt: Think about how light reaches eyes and skin.
2. How can you safely watch a solar eclipse? (Look quickly and then look away. / Look through ordinary sunglasses. / Use certified eclipse glasses or project the image through a pinhole onto card. / Look through binoculars.) → Use certified eclipse glasses or project the image through a pinhole onto card.Prompt: Ordinary sunglasses let through far too much light.

Free online practice with hints and printable worksheets for this skill: eurekami.com/science/grade-3.