Year 6 Angle Lesson
Year group: 6
ICT resources: Use of PC protractor (either DfES CD-Rom or Ambleside website
(http://www.ambleside.schoolzone.co.uk/ambleweb/numeracy.htm), projector
Teaching objective(s):
 To estimate the size of an angle.
 To measure the size of an angle accurately
References to the Framework: Year 6 – Shape and Space, p110 – To estimate and
measure angles.
Activities:
Organisation
 Whole class for mental starter and teacher input;
 Children working in 3 ability groups for main part of the lesson.
Mental starter
 Using number cards quick fire questions involving shape and angle.
Teacher input
 Use PC protractor Show the Angle section to refresh children’s understanding of
what different size angles look like.
 Use estimating to 90 and 180 sections to teach how to estimate the size of an
angle.
 Ask children to estimate the size of different angles on the screen. Move onto
Make and Measure section to teach use of a protractor for measuring accurately.
Group Activities
 Group A (Low ability): Make the angle game (on computer).
 Group B (Middle ability): Angle measuring sheet.
 Group C (Higher ability): Construct triangles and measure angles, checking that
these add to 180 degrees.
Plenary
 Using different sized card triangles ask children to estimate the size of each angle
and check using A3 sized protractor.
 Check that angles add to 180 degrees. Extend children’s understanding by asking
what angles in other polygons must add to.
How the software enhanced the project – The PC protractor is an excellent resource
for whole class teaching of the skills of drawing and in particular measuring angle
sizes. This is a lot clearer than using a protractor with an OHP or an acetate of a
protractor.