Fast Fix – Visualising Plant Cells

Use red onion when teaching students how to use a microscope.

Prepared slides are expensive and easily broken, particularly by excited year 7s. Before you teach your students how to mount a slide with iodine and cover slips, teach them how to focus a microscope using red onion.

Red onion:

  • Peels very easily;
  • Requires no staining;
  • Are much smaller than white onions (less wastage).

How do you teach microscopy?

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