Impact Line

Impact lines focus on students number sense and their understanding of directed numbers.
Provide students with or allow the students to create a list of advantages and disadvantages, on a particular concept/ topic . The students then work together and discuss which will have the largest positive and negative impact.

5 would be the largest positive impact and -5 would be the largest negative impact. As a challenge students should work out that 0 means the event has no impact at all on the topic.

Geography Example

Advantages and Disadvantages of Hydropower
5 Advantages

  • Once a dam is constructed, electricity can be produced at a constant rate.
  • The lakes water can be used for irrigation purposes.
  • When in use, electricity produced by dam systems do not produce greenhouse gases.
  • The build-up of water in the lake means energy can be stored until needed.
  • The lake that forms behind the dam can be used for water sports and leisure.

5 Disadvantages

  • Dams are extremely expensive to build. High cost means they must operate for decades to become profitable.
  • Building dams can affect the water supply to towns and villages.
  • Towns and villages need to be flooded, meaning people will lose their homes and natural environments destroyed.
  • Building a large dam alters the natural water table level.
  • Dams have been known to breach. This has subsequently led to death


Download Resources

Leave your comments

Post comment as a guest

0 / 500 Character restriction
Your text should be in between 10-500 characters

Related Articles

Grid Lock Questioning Grids Questioning Grids are an idea I've seen used by a teacher within my old school. Its an Idea I liked very much as it brou... Numeracy Resources
Measure of Success I designed ‘Measure of Success’ as way of rewarding students. Within my school we have a policy to give out 3 achievemen... Numeracy Resources
Thermometer of Understanding Students have to think about directed numbers, (positive and negative numbers), in relation to their learning within the... Numeracy Resources
Total Wordout Students have to identify and total key words from the lesson using scrabble blocks. To enhance this you could give stud... Numeracy Resources

Danielle Bartram

Maths Lead Practitioner

Acklam Grange School