Apresentação: Desvendando a Lógica das Porcentagens

Section role: supports the 'Desvendando a Lógica das Porcentagens' section while the teacher systematizes the strategies found by student groups and formalizes fraction associations. Slides: (1) Title — 'A Lógica das Porcentagens'; (2) Frações e Porcentagens — bullets: visual representations of 10% as 1/10, 25% as 1/4, 50% as 1/2, and 75% as 3/4 using divided circles and bars; (3) Desconto: O Preço Diminui — bullets: concept of paying less, step-by-step subtraction of the calculated part from the total, example of R$ 200,00 with 25% off; (4) Acréscimo: O Preço Aumenta — bullets: concept of paying more, step-by-step addition of the calculated part to the total, example of R$ 100,00 with 10% extra; (5) Conexão com o Cotidiano — bullets: linking back to the store windows in Section 1 and group discoveries in Section 2; Closing slide: 'Como você decide se vai somar ou subtrair o valor da porcentagem?' — sets up the individual assessment section that follows.

Lara da Teachy