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These lesson plans come in all shapes and sizes and cover every angle of secondary geometry you could wish for
Master maths with Maths Progress (Second Edition) for KS3 from Pearson
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Remind your students that maths isn’t just about numbers with this detailed lesson from Colin Foster that encourages pupils to take a closer look at what we know about geometry, and polygons in particular.
What makes a parallelogram a parallelogram? Can the attributes of a shape be mathematically defined and used to decide whether, say, something that looks like a rhombus actually is one?
Click here to get this free lesson plan.
Can you make a shape sorter, with at least four different shapes and holes, so that each shape will go through just one of the holes?
This lesson plan looks at shape sorter toys – which will be familiar to most students, particularly if they have a younger sibling – as designing and making one can be a good challenge for those in Key Stage 3. It requires a lot of careful thought, particularly if we want to avoid any shapes fitting through the ‘wrong’ hole.
Students will have to decide which shapes to include (they can go for easy or hard options), how big to make them, and how to draw out the required nets accurately. An additional constraint can be that all of the shapes should be able to fit inside the finished box at the same time.
The angles created by overlapping regular polygons can be easy or difficult to calculate, depending on what information you are given. So, taking a creative approach to important mathematical processes like this can deepen students’ understanding of the principles involved and develop vital skills of reasoning and deduction.
In this open ended lesson, learners explore a sequence of gradually larger shapes and consider what mathematical questions they can ask about them. What is the same and what is different about a group of triangles, and how can they be drawn accurately. What measurements make an impossible triangle, and can students work out which triangles come next in a sequence? This KS4 lesson also gives students the chance to use Cosine.
Although we live in a digital age, analogue timepieces are still all around us and provide a helpful context for exploring angles.
Students often approach the topic of angles by memorising lots of vocabulary (acute, obtuse, right angle, etc) and ‘facts’ about angles around a point, on a straight line, inside and outside a triangle and other polygons and between a transversal and parallel lines.
Then they have to choose the appropriate rule to get the right answer to each calculation.
In this lesson, a clock face is used to stimulate some calculations involving angles. First, students are invited to estimate the size of the angle and then to calculate it exactly. Initially, some of the calculations are quite easy, while others are more complicated as the lesson progresses. Provided that students know that there are 360° in a whole turn, they should be able to work out everything else for themselves.
‘Shape Up’ teaches students about line and rotational symmetry and how they are related, getting them to invent and draw their own shapes with particular symmetries.
Ladders leaning against walls is a classic scenario for mathematics problems and is often used to address topics such as Pythagoras’ theorem and trigonometry.
In this lesson, the situation of two crossing ladders is used as an opportunity to work on ideas relating to similar triangles.
How high will the crossing point be above the ground and how far will it be from each wall? What happens for different lengths of ladders? What happens if the walls are further apart or closer together?
Students need to identify triangles that are similar and then construct equal ratios to work out their answers. They will notice interesting properties, such as the fact that the distance between the walls does not affect the height of the crossing point. There are also connections with an average called the harmonic mean.
Learners are often asked to practise finding the third angle of a triangle when the other two are given. In this lesson they get the opportunity to work on the topic area by finding all three angles according to different constraints.
Applying their knowledge of scale and Pythagoras’ Theorem, students are tasked with calculating the shortest route between two destinations on a map and explaining their reasoning as clearly as possible in this detailed lesson plan devised by Colin Foster.
‘Hopping Along’ sees students examine the effect that margins of error can have on otherwise seemingly clear results. Starting with the seemingly clear result of a race, students look at how multiple inaccuracies in the measurement of distance and time can combine to produce a very different – and even counter-intuitive – outcome.
In this lesson, students use Pythagoras’ theorem to find accurate values for the perimeters of some triangles. Although the values of the perimeters are so close that it would be very hard to distinguish them by measurement, mathematics makes it possible to be absolutely sure about the order in which they come.
Traditionally, pupils are taught geometrical transformations by learning a set of skills they can apply to reflecting, rotating and enlarging shapes without giving the process too much thought. But what if they were to called upon to use those skills to solve a mathematical problem?
In this lesson by Colin Foster, that’s precisely what they’re tasked with doing…
In geometry students need to use their spatial reasoning and visualisation skills to understand the shapes and how they will move when broken down into points and lines. This lesson allows pupils to look at two fixed points and how they relate to other points.
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A comprehensive set of resources designed for mastering maths and building confidence at KS3 from Pearson…
How the schemes of work of this semi-formal SLD/MLD curriculum can make a difference in your setting… 1 | Cross-curricular EQUALS’ schemes of work are open to personalisation, beginning at the start of the...
How the schemes of work of this semi-formal SLD/MLD curriculum can make a difference in your setting…
EQUALS’ schemes of work are open to personalisation, beginning at the start of the...
This worksheet lets children practise their letter formation for ones that have straight lines – ‘v’, ‘w’, ‘x’, ‘k’, ‘z’ – by going over the dotted letters, then writing them out in the space beneath. Jelly and Bean’s reading scheme...
This worksheet lets children practise their letter formation for ones that have straight lines – ‘v’, ‘w’, ‘x’, ‘k’, ‘z’ – by going over the dotted letters, then writing them out in the space beneath.
Jelly and Bean’s reading scheme...
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This worksheet features four sentences, each missing an ‘sp’ or ‘st’ word. Children need to use their comprehension skills to choose the correct ‘sp’ or ‘st’ word to write in the gap from a choice of three.
An image is...
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