Optical illusion - grammar (reading)
By the end of the lesson some students will have clarification of articles 'a/ an' and 'the' in the context of reading descriptions about optical illusions.
To provide practice in reading for comprehension and fluency speaking in using articles 'a/ an' and 'the' to describe a picture.
Procedure (26-45 minutes)
T displays picture of vase/ faces illusion on power point and asks if students know what it's called (optical illusion) T asks: 'Can you see the two pictures?" 'What are they?' Ss: 'Vase and 2 faces'. T shows slide with 4 illusions. T : 'Can you see the illusion in each one ? Discuss with your partner.'
T gives Ss picture of 4 optical illusions and cut out words and phrases attached to sheet. T tells Ss to match the patterns and shapes to the illusion. T demonstrates on WB FB: T reads out each phrase in turn and asks Ss in which picture they can see this: T: criss-crossed lines, parallel lines, straight lines. (b) T: parallel lines, a staircase, straight lines (c) T: curvy lines, a rod, straight lines, towers. (d) T: black background, criss-crossed lines, spots, straight lines. (a) FB: T calls on volunteers to answer as each description is read.
T points to the illusions and pronounces the names of the illusions: 'Schroeder, Zollner,the Hermann Grid and 'the impossible object'. T says: 'Read the descriptions of four famous illusions. Match the descriptions 1-4 to pictures a-d. FB: T writes answers on the white board: 1C, 2D, 3B, 4 A.
T says: "Let's focus on grammar. a/an , the'. Do you know what we call these words?' ss: 'articles'. T; What do they mean? When do we use them? S ideas. T shows slide: Match the article with the rule and demonstrates the first one with the WC. T HO copies for ss to do in pairs. FB: T asks volunteers A, B or c.
T shows slide of Escher's waterfall and asks CCQs: Is MC Escher a master of optical illusions or the master of optical illusions? (a) In this picture does a waterfall go down the canal or does the waterfall go down a canal? (the) The MC Escher was a master of optical illusions. Right or wrong (wrong) T asks volunteers to fill in the gaps with the correct article. FB: T checks/ corrects.
T shows slide with 2 sentences with 'the' and ask ss to listen to the difference in pronunciation. T plays track 2.04 and asks ss to repeat. T: Why is the pronunciation different?' S: 'The' is before a vowel in the first sentence. T: Let's practice. T shows slide with list of nouns and drills pronunciation. T shows slide with 3 sentences using 'the' and ss have to decide the correct pronunciation. FB: volunteers to read out sentences.
T demonstrates with volunteer. T describes while volunteer draws. T shows slide with instructions. T HO pictures for ss to describe in pairs. T monitors.