2 standalone teaching decks, one per section. Each is a single HTML file with the slides, the videos, the interactive tools, the check questions and the speaker notes already inside it — email it, put it on a USB stick, or open it straight from a projector laptop. Nothing to install.
| Reveal in steps | Press → or Space and the bullet points appear one at a time, then the worked example. Nothing is on screen before you want it there. |
|---|---|
| Video built in | The lesson video that matches each slide sits in the side panel — no switching tabs mid-lesson. (This is the only part that needs the internet.) |
| Interactive tool | A live model for the idea on that slide: a jumping number line, a sign-rule table, a 100-grid that highlights multiples, a factor comparer, a divisibility checker that explains every test, a powers explorer and a square-root estimator. |
| Quick checks | One or two questions per slide, drawn from the same verified bank as the practice pages. Type an answer and it marks instantly, or press Reveal for the full method. |
| Speaker notes | Press N. Each slide has notes on what to model, the misconception to watch for, and a suggested time. |
| Discussion prompt | Every slide has a question to put to the class, in the Discuss tab. |
| Presenter controls | O overview · T lesson timer · D dark/light · F full screen · 1–9 jump · ? shortcuts. Works with a presenter remote. |
Nhân và chia số nguyên và số thập phân cho luỹ thừa của 10.
Làm tròn số đến số chữ số thập phân hoặc chữ số có nghĩa cho trước, và chọn độ chính xác hợp lý.