OK, I'll stop with the corny gags...

EmmTech arrived on time just after Break 2, patiently awaiting team allocation and commencement of task.

The two teams decided (10 members each), our able KS4 girls led the groups. Firstly, 2 pupils from each group led the design and manufacture of the roller car top. Thank you Mrs Collins for your support here.

It was interesting watching the teams work. Mrs Slyfield and I were greatly impressed with the delegatory work -- you quickly assessed strengths, past expeiences and skills and allocated tasks accordingly.

Annoyingly, George had reminded me that we were looking for average speed, not speed per se. We added structural integrity to the success criteria. I mean, would you want to ride a 'coaster that wobbled side-to-side? I thought not.

On to the actual 'coaster design. I would say that Team 1 went for a classical design, long straight, steady but steep rise, followed by a dramatic fall and, of course, a loop. I'm less convinced that you thought through the energy transfers - the conversion of Max PE to Max KE took place over a short distance, coupled with a long straight of relatively high friction meant that your car came to a stop pretty quickly.

Team 2 went for a more adventurous design, but structurally less sound, I believe.

George put on display a countdown from the last 5 minutes and there was a flurry of activity in the last 5 minutes.

Oh, I think next session, much more needs to be done on the poster front.

In the end, Mrs Slyfield and I decided that you should have an extra hour to finish these off, so next thursday will be the decider.

Only one team will win.

On the whole though, I enjoyed the process. I thought you worked well, but could have spent more time actually designing on paper, the 'coaster. See the pictures above.

A round of applause please for Mrs Slyfield - she had the room beautifully prepared for us.