Just as lower-grades students need help learning to use a ruler to measure length, so middle-grades students also need help with the mechanics of using a protractor&#151;aligning it properly with the vertex and sides of the angle to be measured and reading the correct size of the angle on the scale.
(the angle; to be measured; ) (middle-grades students; also need; help with the mechanics of using a protractor&#151) Context(middle - grades students also need,List([86, 118))):(middle-grades students; also need help with the mechanics of using a protractor&#151 aligning properly; with the vertex and sides of the angle) Context(middle - grades students also need aligning properly,List([86, 190))):(middle-grades students; also need help with the mechanics of using a protractor&#151 aligning properly with the vertex and sides of the angle to reading; the correct size of the angle on the scale)
middle - grades students also need,List([86, 118)) middle - grades students also need aligning properly,List([86, 190))
the angle middle-grades students middle-grades students middle-grades students
to be measured also need also need help with the mechanics of using a protractor&#151 aligning properly also need help with the mechanics of using a protractor&#151 aligning properly with the vertex and sides of the angle to reading
help with the mechanics of using a protractor&#151
with the vertex and sides of the angle
the correct size of the angle on the scale