Lesson plan

# Unloading a Food Truck: Trajectory of Understanding

teaches Common Core State Standards MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards 8.EE.C.7.b http://corestandards.org/Math/Content/8/EE/C/7/b
teaches Common Core State Standards 8.EE.C.7.a http://corestandards.org/Math/Content/8/EE/C/7/a

# Unloading a Food Truck: Trajectory of Understanding

Students will understand that equations in one variable may have multiple solutions, and equations simplified to a=a means any real number will satisfy the equation. The suggested public discussion of student work shows solution paths that have a trajectory of understanding, from using values incorrectly to identifying and describing an equivalent relationship. Three pieces of work are shown. The first shows an equation with incorrect coefficients and a solution of x=30. The second piece also shows an incorrect equation because it leaves out the boxes the children have already unloaded. However, the second piece of student work does show that the student understands a=a, or all real numbers are the solution to the equation. Work sample three is an accurate depiction of a correct equation and solution. The student understands that no matter how long the children are unloading boxes, James and his sisters will always be unloading at the same rate. This Student Work Discussion Plan was created by a member of the 2015 Delaware Dream Team. Special Materials: None