Sign up or log in to bookmark your favorites and sync them to your phone or calendar.

High School [clear filter]
Monday, October 14

9:15am CDT

Exploring Concepts through Authentic Data Models
Learn how authentic data collection and analysis allows us to engage students with the Standards for Mathematical Practice, especially “Model with Mathematics” and “Construct viable arguments and critique the reasoning of others”. Wading through messy data allows students to process and make sense of mathematical concepts and tools we need them to learn through interesting contexts. We’ll share activities used from our Algebra II, AP Statistics and Calculus classes, and share how can you incorporate data collection and analysis to your lessons to increase student engagement and understanding.


Stephanie Groathouse

AP Stats/Pre Calculus, Waukee HS

Jordan Edgerly

Waukee High School

Monday October 14, 2019 9:15am - 10:00am CDT

12:30pm CDT

Triangle Congruence Theorems: Developing Reasoning Through Informal Arguments
This session will include the description of an activity used to introduce triangle congruence theorems in a high school geometry course. The purpose of this activity is to develop students’ reasoning and justification through informal arguments prior to writing proofs using triangle congruence theorems. Participants will discuss the number of elements needed to prove two triangles congruent. Participants will then be assigned a possible triangle congruence theorem. Group discussion will follow, including arguments formulated by participants, as well as student examples from high school geometry students. The session will conclude with a summary of the activity and its use for implementation in a high school geometry course.

avatar for Brooke Krejci

Brooke Krejci

Aplington Parkersburg High School
I am in my sixth year of teaching, and I have taught grades 7-12. I am wrapping up my EdD in Curriculum and Instruction with an emphasis in Mathematics Education. I just finished my research on preservice teachers' mathematics teaching efficacy. I currently teach general math, pre-algebra... Read More →

Monday October 14, 2019 12:30pm - 1:15pm CDT