## Results for "earth and atmosphere" (1228)

### Lesson 5: Safety and signalling

Publication date:
2010 to date

5 files 0

### Lesson 5: Safety and signalling

Publication date:
2010 to date

5 files 0

### Classifying rational and irrational numbers

This lesson develops the concept of distinguishing between rational and irrational numbers. In particular, students will enhance their ability in:Classifying numbers as rational or irrational.Moving between different representations of rational and irrational numbers. An initial activity asks students to classify...
Publication date:
2010 to date

2 files 0

### Modelling linear and exponential growth

This lesson develops the concept of modelling linear and exponential growth. In particular students will enhance their understanding of:Translating between descriptive, algebraic, tabular, and graphical representation of the functions.Recognizing how and why a quantity changes per unit interval.This is achieved by...
Publication date:
2010 to date

2 files 0

### Adding and subtracting directed numbers

This lesson develops the concept of adding and subtracting directed numbers. The activities address common misconceptions about the addition and subtraction of directed numbers. Students explain their reasoning using diagrams.The activities use the ‘charge’ model of directed numbers. For example, a diagram showing 6...
Publication date:
2010 to date

2 files 0

### Inscribing and circumscribing right triangles

This is a concept development lesson that develops thinking on decomposing complex shapes into simpler ones in order to solve a problem. There is work on bringing together several geometric concepts to solve a problem. Students also find the relationship between radii of inscribed and circumscribed circles of right...
Publication date:
2010 to date

2 files 0

### Sampling and estimating: counting trees

This is a problem solving lesson where students develop their understanding of the following areas:Solve simple problems involving ratio and direct proportion.Choose an appropriate sampling method.Collect discrete data and record them using a frequency table.A sheet representing a tree farm shows new trees with a...
Publication date:
2010 to date

2 files 0

### Comparing lines and linear equations

This resource develops the concept of interpreting speed as the slope of a linear graph. There is also work on translating between the equation of a line and its graphical representation.Students consider a graph drawn to model the flow between two identical right rectangular prisms. There are subsequent questions on...
Publication date:
2010 to date

2 files 1

### Building and solving complex equations

This resource develops the concept of solving equations where the unknown appears once or more than once.Students are given the equationx = 6and then told that the value of x could have been derived from the equation3x =  2x + 6Students are then construct their own equation where x appears on both sides, that...
Publication date:
2010 to date

2 files 0

### Three triangles and a square

In this presentation and collection of student worksheets a diagram shows a square and three right angled triangles, with each shape sharing a common side. Some of the lengths are given in surd form, from which students have to find the area of the square.The solution involves the use of Pythagoras’ theorem and surds...
Publication date:
2010 to date

2 files 0