Numeracy - missing angles deduction - Upper KS2

A collection of three numeracy lessons on angles for year 5 or year 6 depending on how it is to be aimed.

Differentiated tasks in each lesson, build at first on measuring angles with a protractor, to then identifying acute, obtuse and reflex.
This then builds on knowledge of right-angles, straight lines and full turns, to deduce missing angles.
Activities to build on inner angles of triangle and quadrilaterals, then deducing missing angles.
Final lesson looks at angle on intersecting lines and intersecting lines across parallel lines and deducing missing angles on these lines.
All lessons follow an accelerated learning cycles, with connection tasks, activation, main activities, demos and consolidation opportunities.