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Extension Activity 1
Working in Groups of 2-3
If time is available, ask the children to design a sail for their
sailboat using appropriate materials. The children could use
photographs of sailboats to research ideas for sail designs
and shapes.
 • Howwillthesailbeattachedtotheirmechanismfor
raising and lowering?
 • Howwillthesailbe‘fixed’inpositionwhenithas
been raised?
Extension Activity 2
Design Task - Working in Groups of 2-3
Their sailboat needs to be rigged for use by a crew with
physical disabilities. The task is to design a sail handling
system to raise and lower two sails, one fore and one aft,
which can be operated from the deck.
They can only use the contents of the kit to make
their prototype.
Allow the children time to select, measure and make a sail
from suitable textiles.
 • Howwilltheyattachthesailto
(i) the raising mechanism
(ii) the sail boom?
 • Howdorealsailboatsdothis?
 • Cantheymakeuseofthe“flagpole”mechanism?
The children should be encouraged to draw plans for their
design, indicating how they think it will work.
On completion ask:
 • Whatchangesdidyoumakeduringthetestingof
your design?
 • Whatwerethemostdifficultpartstomake?
 • Howdidyousolvetheproblems?
Plenary
Review what the children have learnt about movable and
fixed pulleys and how, when fixed and movable pulleys
work together, they form a compound pulley system.
Note: The “rope” that comes with the
kit should not be cut, so an alternative
will be necessary.
To promote the wider use and
application of ICT skills and practices,
the children’s models and work might
be recorded using a digital camera.
levers and pulleys
website: www.knexeducation.co.uk
Lesson 8: The Sailboat
Education
®
52


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