Master Teacher lessons

Big Idea:
Today's review game will bring high energy and deep thinking into the classroom.

Big Idea:
The cosine of 22.5° has to be related to the cosine of 45°, right?

Big Idea:
Why do these trig equations have so many solutions?

Big Idea:
Assess your students' understanding of this unit.

Big Idea:
Meet individually with students and give them some time to hone their skills.

Big Idea:
Students disprove a potential identity and then derive the real cos(A - B) formula.

Big Idea:
How do the double angle formulas follow from the sum and difference formulas?

Big Idea:
Get students ready for their quiz and give them tools to check their work.

Big Idea:
A formative assessment will gauge the students' understanding of these trig relationships.

Big Idea:
Checking the answers after squaring both sides leads to an unexpected result.