# Suggestions for you as you plan to teach …

• ## … episode01 of the SPT topic: Sound

### There's a good chance you could improve your teaching if you were to:

Try these

• make explicit use of the source–medium–detector model
• model the vibrations as changes in density
• link the movements of the sources to changes in density
• keep the language simple: 'to and fro' may be more effective than 'longitudinal'
• relating what's pictured as a part of the model to human experiences
• draw simple sketches, rather than hanging too much on words

Teacher Tip: Work through the Physics Narrative to find these lines of thinking worked out and then look in the Teaching Approaches for some examples of activities.

Avoid these

• using specious energy descriptions
• drawing or showing transverse waveforms
• asserting that sound is a wave without clarifying explanation of the idea of a wave
• conflating models with the lived-in world

Teacher Tip: These difficulties are distilled from: the research findings; the practice of well-connected teachers with expertise; issues intrinsic to representing the physics well.

This appears as So01TL as So01TLnugget10 in the full materials.

• ## … episode02 of the SPT topic: Sound

### There's a good chance you could improve your teaching if you were to:

Try these

• showing large-scale, slow vibrations producing a sound
• emphasising that all sounds have a source
• tracing the chain from source to detector, via medium, often
• showing changing frequency without changing amplitude
• showing changing amplitude without changing frequency
• measuring frequency directly, linking this to counting the vibrations
• relating delays in hearing sounds to trip times due to the speed of propagation

Teacher Tip: Work through the Physics Narrative to find these lines of thinking worked out and then look in the Teaching Approaches for some examples of activities.

Avoid these

• showing waveforms on an oscilloscope
• introducing wavelength prematurely
• using a strobe without explaining how you see what you see

Teacher Tip: These difficulties are distilled from: the research findings; the practice of well-connected teachers with expertise; issues intrinsic to representing the physics well.

This appears as So02TL as So02TLnugget08 in the full materials.