I recently responded to a blog challenge by a video recording of myself - you can see it by clicking here. Most EFL teachers are probably aware of the activity where students are asked to say some things about themselves, and the others are to guess if they're true or false. I suggested taking this a step further and have the students bring video ...

drawing perpendicular lines using a set... This presentation is also available for download in Scribd and Slideshare. See more presentations by acLiLtocLiMB | Upload your own PowerPoint presentations

This is just a quick game to help you familiarise/remember the terminology used to describe circles/circumferences.

Here's something to help you with circle terminology. Please register over at Purpose Games, and leave a comment here whenever you've played any of my games there.

If we draw an imaginary line across an object, and one side of it is the mirror image of the other, the object is said to have line symmetry; this imaginary line is called the 'line of symmetry'. Line symmetry is also known as 'reflection symmetry'. Some objects, such as a butterfly,  have only one line of symmetry; others have more than ...