Decoding Big Numbers: Teens vs. Tens and the Hyphen Rule

Section role: supports the 'Decoding the Big Numbers' section while the teacher brings the class together to formalize rules, contrast sounds, and show native-speaker pronunciation models. Slides: (1) Title — 'Decoding the Big Numbers: Tens, Hyphens, and Rules'; (2) The Family of Tens — bullets: twenty (20), thirty (30), forty (40), fifty (50) with the '-ty' suffix highlighted; (3) Continuing the Tens — bullets: sixty (60), seventy (70), eighty (80), ninety (90); (4) The Magic Hyphen — bullets: why we use a hyphen in compound numbers like twenty-five (25) and forty-seven (47), connecting back to the word-number sorting task from Section 2; (5) Sound Detective: Teen vs. Ty — bullets: auditory and spelling contrast between fourteen and forty, highlighting emphasis shifts; (6) Listen and Repeat — bullets: guided pronunciation practice for tricky words like fifty and fifteen; (7) Reaching 100 — bullets: introducing one hundred as the final goal of our number quest; Closing slide: 'Are you ready to prove your skills as a Number Master?' — hands control back to the teacher for the individual verification assessment in Section 4.

Lara from Teachy