Module 2: Written feedback - PGCE

Handout 4.2.3
Task B
The following example of work is from Fiona’s logbook. All pupils complete this type of logbook
at the end of the week in Key Stage 3. Logbooks provide valuable information about what the
pupils have learned. Some work is marked in detail as indicated below because these items
have been identified as milestones in all pupils’ learning. The objectives are shared with pupils
and the teacher uses the expected pupils’ outcomes to interact with pupils while they complete
their logbooks. This can now be related to the yearly teaching objectives for Year 7.
The lesson objectives are:
To be able to use a simple particle model to explain:
• why diffusion only occurs in liquids and gases;
• what happens when air is heated in a can with a lid.
(These are shared with pupils.)
The expected pupils’ outcome is a way of showing how pupils of different ability may
demonstrate their achievement.
A Uses the correct terminology to describe the sequence of the process when:
• two different gases diffuse;
• air expands and pushes and releases the lid of the can.
This is broadly related to level 4.
B Explains using a simple particle model or using drawings:
• how the particles in a gas are constantly moving, bumping into each other and the walls of
the container. When two gases are brought together such as bromine and air, the particles’
continual movement allows them to gradually mix together. By the end, the particles of air
and bromine have completely mixed. This process occurs independently of the density of
each gas. Start to relate the process of diffusion to liquids.
• how air expands when it is heated. The particles move faster and faster as the temperature
increases. Finally, the number of collisions on the lid is too great and it is released.
This shows aspects of the yearly teaching objectives for Year 7 and is broadly related to level 5.
C Is confident in explaining all the outcomes broadly related to level 5. In addition can explain or
use drawings to show:
• why the structure of the solid prohibits the process of diffusion occurring;
• how the increase in energy of the air particles is linked to the increase in the number of
collisions between particles and the walls of the can. This increases the force on the walls of
the can and its lid. Finally, the force is strong enough to release the lid.
This shows aspects of the yearly teaching objectives for Year 7 and is broadly related to level 6.
27 Unit 4, Module 2: Written feedback © Crown copyright 2004