few_shots: 
Example:
Concept/skill: 
Prove the addition and subtraction formulas for sine, cosine, and tangent and use them to solve problems.

Problem/activity:
Find the general solution for:
$${\mathrm{cos}\left({\pi\over2}+x\right)=\mathrm{tan}{\pi\over4}}$$


Answer: 
Yes. An initial step when solving for x in this problem requires the use of the addition formula for cosine on the left side of the equation.

Now, assess whether the following problem or activity is 'aligned' with the given Common Core standard in Mathematics.

shot_info: fl_problem_001894_pos_0

HS_0
standard_description: Add up to four two-digit numbers using strategies based on place value and properties of operations.
problem_activity: Narrative
The purpose of this activity is for students to learn stage 1 of the Jump the Line center. In this stage, students take turns making strategic choices about numbers to add or subtract to reach target numbers. Students choose 3 target numbers and mark them on the number line. Both players start at the beginning of the number line. They spin all 3 spinners and decide which of the moves they want to use on their turn. Students take turns spinning and moving, trying to land exactly on the target numbers. The first player to land on 2 target numbers wins.
Required Materials
Materials to Gather
Dry erase markers
Paper clips
Sheet protectors
Materials to Copy
Jump the Line Stage 1 Gameboard
Jump the Line Stage 1 Spinners
Launch
Groups of 2
Give each group a spinner, paper clip, dry erase marker and gameboard.
Display spinners and gameboard.
“You and your partner will choose 3 target numbers and mark them on your number line.”
“Then you will take turns spinning all 3 spinners. On your turn you can decide which spin to use. Your goal is to jump to one of the numbers you and your partner marked.”
“The first player to land exactly on 2 of the target numbers wins.”
Play a round with the class, if needed.
Activity
15 minutes: partner work time
Activity Synthesis
Display a gameboard with 3 target numbers. Spin the three spinners.
“This is my gameboard and my spins. Which spin would you use? Why?”


aligns: no