Quadratic Inequalities – DSSD

In a twist on Craig Barton’s SSDD problems, I sometimes find that Different Surface, Same Depth (DSSD) problems can be useful.  I find this sort of task more impactful some time after pupils have first encountered the idea.  If we were working quadratic inequalities then I issued this, there might be an assumption that’s what would be involved here too.  Instead, some weeks later I will issue this task.  Pupils first of all have to discern that a quadratic inequality has arisen and then be able to solve it.  Many pupils, in my experience, fail to identify quadratic inequalities when they arise in other contexts.  Of course, when I issue this task I will not tell pupils that quadratic inequalities are present.  Instead, I’ll let them stumble upon it.  


Credit: @chrismgrane84

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s