All I Can Do Is Smile...

This was my practical in class today:

I teach three year 7 classes (a high ability class, a middle ability class and a bottom set). I have limited the about of experiments or practical I do with my bottom set because (although I absolutely adore the students) they tend to get a little over-excited, don't follow instructions and break things. Today we started a new topic, energy, and the first lesson is to practice using a thermometer. So, I decide to keep it simple with this class and we'll measure the energy loss when hot water cools... Basically they measure the temperature of the water throughout a 10 minute period and record their results in a chart.

I drew the chart on the board for the students to fill in: two columns - very simple: minutes and degrees Celsius - I even filled in the minutes for them (1 min, 2 min, 3 min, etc). So all they had to do was watch the clock and write down the temperature of the water...

Once the students started, I walked around the room, monitoring each group to see if they needed help. This one group of girls caught my eye because they were talking and laughing and not really concerned about time. So, when I checked with this group, they assured me that they were watching the clock. It seems that they recorded the temp after one minute without a problem. Then, they watched the clock for two minutes and recorded the temperature. And then three minutes before they recorded the temperature, etc... They were up to five minutes when I spoke with them...