Step 5 Objective
Begin to structure an approach when exploring a simple task or solving a problem. Generate and check the necessary information.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
What if pupils find this a barrier?
Line Crossings
- Draw three straight lines (line segments) so that some cross over each other.
- How many crossings are there?
- Try different arrangements of the lines. What is the maximum number of possible crossings?
- Try using more lines.
- Is there a rule for the maximum for any number of lines? If so, write it down.
Use the problem Line Crossings.
- Are you sure that you have all of the different arrangements for four, five lines?
- How can you be sure?
- What different types of arrangement are there for five or six lines?