Números del 20 al 100: Reglas de escritura y familias

Section role: supports the formalization section while the teacher guides students through the correct spelling and rules for numbers up to 100, connecting back to the base numbers reviewed in Section 1 and the groupings discovered in Section 2. Slides: (1) Title — 'From Twenty to One Hundred'; (2) Decenas principales — bullets: 20-Twenty, 30-Thirty, 40-Forty (highlighting the absence of 'u'), 50-Fifty, 60-Sixty, 70-Seventy, 80-Eighty, 90-Ninety, 100-One hundred; (3) Mini-juego 1 — 3 multiple choice questions verifying tens spelling; (4) Números compuestos — bullets: combining tens and units with a hyphen, example 'Twenty-one', 'Fifty-six'; (5) Mini-juego 2 — 3 multiple choice questions identifying correct hyphenated numbers; (6) Excepciones y repaso — bullets: comparing similar sounds like Sixty and Seventy; (7) Mini-juego 3 — 3 multiple choice questions on mixed numbers; (8) Closing slide — 'Are you ready for the final code?' — hands control back to the teacher for the individual worksheet. This material is part of a English foreign-language class for students in Colombia learning English. Regardless of the material's language, the key terms and examples being taught must be written in English, not in the students' native language.