Stretch and compress springs to explore the relationships between force, spring constant, displacement, and potential energy! Investigate what happens when two springs are connected in series and parallel.

I chose Invisalign because the aligners are clear. Nobody noticed I was wearing them and I liked that you could take them out to eat. I sent pictures to my friends throughout the treatment; they were amazed by how my teeth were changing and how good they looked. 'I wish I’d done it years ago ' The treatment gave me confidence from start to finish. I wish I’d done it years ago. You don’t realise how important your smile is.

Invisalign has had a massive impact on my life: I smile confidently, I look better in photographs –my teeth aren’t an obsession anymore. The results were everything I imagined.

Some people did notice I was wearing the aligners, but only because I was smiling more. Other people didn’t realise until I told them at the end of the treatment. You can take them out for eating, so there are no problems with food. And if you want to go to a meeting and smile without the aligners, you can. 'I’m 100% satisfied and would recommend Invisalign to anyone ' I’m 100% satisfied and would recommend Invisalign to anyone.

I’m more confident, more outgoing and smiling so much more. A smile really can change your life. Because I wasn’t a teenager, I wanted a more discreet option than metal braces. I didn’t want to draw more attention to my teeth. With Invisalign, people didn’t even notice I had the aligners in until they could see that my teeth were moving. When I had the aligners fitted I liked how easy they were to insert and remove, and that I didn’t have to keep visiting my dentist.

They fitted my lifestyle. 'The Invisalign treatment has dramatically improved my confidence ' The Invisalign treatment has dramatically improved my confidence. I was always a happy, bubbly person but would try and hide my teeth.

Now I love smiling. I would definitely recommend it to others. I wish I had done it sooner.

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