Drip rates have traditionally been taught by using an equation or formula. This video shows how the answer can be worked out using mental reasoning. This method calls for a deeper understanding of the problem and is less likely to be forgotten. A relational understanding of time and volume and rate is developed and this understanding can be transferred to other situations. Knowing some mathematical facts or routines such as a formula for drip rates is not enough to enable learners to use that knowledge flexibly in a wide range of situations. The mathematical processes involved in calculating drip rates need to be understood if the learner is to know if their answer is correct or not.
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This work by Helen Lindsay is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
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