Year 8 Science: Density
Science lesson presentation with a hook, a worked example and an exit ticket
This is a 50 minute Year 8 lesson on density built the way an explicit teaching lesson runs: a hook, the intentions, the terms, a model, a worked example, practice with real data, two checks and an exit ticket. The slide order is the lesson plan, so a teacher can swap density for any topic and keep the structure.
Every slide, in order
The whole deck as it renders, one slide after another. Read it the way the audience would.
The structure
What each slide is doing, so you can reuse the order even with different content.
- Slide 1cover
- A playful cover that still names the unit, the lesson number and the time.
- Slide 2intro
- The hook is a contradiction, and the exit ticket will ask it again at the end.
- Slide 3content
- Learning intentions and success criteria, so students can judge their own exit ticket.
- Slide 4content
- The vocabulary settled before the practice, formula included as a term.
- Slide 5diagram
- The particle model in four rings: particles at the core explain the floating at the surface.
- Slide 6process
- The worked example, done slowly on the board while this stays up as the map.
- Slide 7metrics
- The activity table with the density column left as question marks: that column is the lesson.
- Slide 8metrics
- The answers revealed as bars, with the float line at 1.0 stated in the description.
- Slide 9quiz
- Check one tests the prediction intention with four densities to choose from.
- Slide 10quiz
- Check two tests the ice anomaly, the fact students argue about most.
- Slide 11takeaway
- The exit ticket asks the hook again, which is how the lesson proves it taught something.
How to adapt this deck
A humanities lesson keeps every beat and swaps the data table for a source analysis grid; the blank column becomes the inference column and the reveal becomes a modelled reading. A double period runs the same deck with a second practice cycle inserted after the first check, not a longer lecture at the front. For primary school, cut the key terms to three, make the hook physical, a bucket and five objects beats any slide, and keep the exit ticket to one question. Grade 8 readers outside Australia can read Year 8 as the same age band. Across every version the check slide is the one that cannot be cut. A lesson without a mid point check is a lecture with slides, and the whole point of the reveal and practice cycle is that the teacher finds out who is lost while there is still time in the period to do something about it.
What makes this deck work
The hook is a contradiction the exit ticket answers
Slide two asks why 3,000 tonnes of steel floats while 3 grams of sand sinks, and slide eleven makes explaining it the first exit ticket question. Opening and closing on the same puzzle gives the lesson a visible arc, and gives the teacher a clean read on who actually got there.
The table leaves the answer column blank
Slide seven lists cork, ice, water, oil and iron with mass and volume filled and density as question marks, and the next slide reveals the answers as bars with the float line named at 1.0. The blank column is the practice; the reveal chart is the feedback, thirty seconds later.
Two checks map to the two intentions
The multiple choice tests prediction from density, with four options and the answer in the hint line, and the true or false tests the ice anomaly. One check per learning intention, placed after practice, is the explicit teaching pattern, and the deck makes it visible enough to reuse for any topic.
Questions people ask
How do I structure a lesson presentation?
Hook, intentions, vocabulary, model, worked example, practice, check, exit ticket. That is the slide order here, and it mirrors the explicit teaching sequence: show, do together, do alone, check. Swap the density content for any topic and the eleven slide skeleton holds.
How many slides for a 50 minute lesson?
Ten to twelve, because the middle of the lesson is students working, not watching. This deck holds two slides, the data table and the answers, on screen for almost twenty minutes of activity. More slides than that usually means the deck is doing the talking the teacher should be.
Should the answers be in the deck?
Yes, on their own slide after the practice, the way the density bars follow the blank table. Instant feedback beats marking the sheet overnight. The quiz layouts keep their answers in a hint line the class cannot see, so the reveal stays under the teacher’s control.
How do I use the quiz slides in class?
Put the question up, take hands or mini whiteboards, then reveal. The multiple choice slide holds four options in a grid and the true or false slide holds one statement, and both carry the answer as presenter facing hint text, so the room commits before the reveal.
Can students open the deck on their phones?
Yes. A share link opens read only on mobile and always shows the latest saved version, so absent students see exactly the lesson that ran. The speaker notes pane does not exist below 1024 pixels, so notes stay private from a phone audience by construction.
Can I export the lesson for the school’s PowerPoint?
Yes. The editable PPTX export keeps the data table as a native table and the bar chart as a native chart on paid plans, so a colleague can change the materials or the numbers in PowerPoint. The free PDF export prints one clean page per slide for handouts.
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