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This content is taken from the National STEM Learning Centre's online course, Teaching Practical Science: Biology. Join the course to learn more.

The breakdown of starch by amylase

Here is the final video of three to watch as part of the learning objectives activity.

This enzyme practical can be quite long (and boring) if the concentration of amylase is too low. So to avoid students sitting for twenty minutes doing nothing but testing a sample every minute, it is essential to use a low concentration of starch and to practice the experiment first. Aim to find a concentration of enzyme which will break down the starch within five minutes


As this can be a temperamental practical to set up, do you think it is worth the effort in terms of what students can learn? If not, how would you add challenge to the practical, or what other practical would you use in this section of the syllabus?

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This video is from the free online course:

Teaching Practical Science: Biology

National STEM Learning Centre