Reflection: Connection to Prior Knowledge Trigonometric Ratios - Section 1: Warm Up and Homework Review


One simple way to challenge students (Math Practice 1) is to present them with a skill they learned in previous years with no prior warning.  When presented with this context problem with no warning, about 40% of my students caught on right away.  The rest required a certain amount of coaching either from their peers or myself.  At this point in their mathematical journey, they need to be able to fluently recall and use prior skills.  This is going to be fundamental as they head to either the PARCC or the SBAC test in their junior year.  Many of the skills they will use on this test will be older skills.

The issue I noticed on the solving of this problem centered on thoughtfulness.  The only students who didn’t get it right, misplaced the hypotenuse like in this Warm Up.  We went over this problem in class and students quickly rectified the problem.

  Connection to Prior Knowledge: Remembering An Old Skill
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Trigonometric Ratios

Unit 9: Trigonometric Functions
Lesson 2 of 19

Objective: Students will be able to define trigonometric ratios of acute angles.

Big Idea: Students will review and extend their knowledge of trigonometric ratios.

  Print Lesson
Math, Trigonometry, trigonometric ratios, sine, cosine, tangent, Algebra 2, 11th Grade, master teacher project
  51 minutes
trigonometric ratios
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