Properties of Shape - Identify Angles - Planning

In a mathematics lesson tailored for Year 4 students, the focus is on the identification of angles, specifically targeting the understanding of acute and obtuse angles. The session begins with a small step starter to recap previous learning and introduces the key vocabulary such as 'angle', 'obtuse', 'acute', and 'right angle'. The class is then engaged in a teaching input where they explore the definitions of these terms, learning that an acute angle is less than 90 degrees, a right angle is exactly 90 degrees, and an obtuse angle is more than 90 degrees but less than 180 degrees. The lesson uses visual aids and a video to clarify the concept of an angle. Students are encouraged to use a mnemonic to remember the difference between acute and obtuse angles, noting that 'acute' starts with an 'A', which is made of acute angles.

During the independent learning phase, students engage in practical activities where they label a range of angles as obtuse (O), acute (A), or right (R), using physical right angle tools, such as a square or a quarter circle, to compare and estimate the size of the angles. The lesson plan includes differentiated worksheets that allow children to sort images of angles into the correct categories. The plenary session involves reflective questions, helping students to articulate what they have learned about angle types and the skills they've used or found challenging. The lesson plan also outlines different levels of worksheets to cater to varying levels of student proficiency, from those working towards understanding to those capable of greater depth analysis, where they have to calculate and sort angles in a more complex way.