ALEX Resources

Narrow Results:
Lesson Plans (1) A detailed description of the instruction for teaching one or more concepts or skills. Learning Activities (1) Building blocks of a lesson plan that include before, during, and after strategies to actively engage students in learning a concept or skill.


ALEX Lesson Plans  
   View Standards     Standard(s): [MA2015] (4) 23 :
23 ) Recognize angles as geometric shapes that are formed wherever two rays share a common endpoint, and understand concepts of angle measurement. [4-MD5]

a. An angle is measured with reference to a circle with its center at the common endpoint of the rays by considering the fraction of the circular arc between the points where the two rays intersect the circle. An angle that turns through 1/360 of a circle is called a "one-degree angle" and can be used to measure angles. [4-MD5a]

b. An angle that turns through n one-degree angles is said to have an angle measure of n degrees. [4-MD5b]

[MA2015] (4) 24 :
24 ) Measure angles in whole-number degrees using a protractor. Sketch angles of specified measure. [4-MD6]

[MA2015] (4) 25 :
25 ) Recognize angle measure as additive. When an angle is decomposed into nonoverlapping parts, the angle measure of the whole is the sum of the angle measures of the parts. Solve addition and subtraction problems to find unknown angles on a diagram in real-world or mathematical problems, e.g., by using an equation with a symbol for the unknown angle measure. [4-MD7]

Subject: Mathematics (4)
Title: Pizza Problems: An Angle Investigation
Description:

This investigative lesson allows students to identify angle measurements as part of a larger angle. Students will deconstruct 180 degree angles into equal parts. 

This is a College- and Career-Ready Standards showcase lesson plan.




ALEX Learning Activities  
   View Standards     Standard(s): [MA2015] (4) 25 :
25 ) Recognize angle measure as additive. When an angle is decomposed into nonoverlapping parts, the angle measure of the whole is the sum of the angle measures of the parts. Solve addition and subtraction problems to find unknown angles on a diagram in real-world or mathematical problems, e.g., by using an equation with a symbol for the unknown angle measure. [4-MD7]

Subject: Mathematics (4)
Title: Parker's Pizza Additive Angle Activity
Description:

This learning activity should be used at the end of a lesson on recognizing angle measure as additive. The students will find missing angle measurements using a real-world problem. This learning activity can be used as an assessment.

This activity results from the ALEX Resource Gap Project.




ALEX Learning Activities: 1

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