few_shots: 
Example 1:
Concept/skill: 
Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles.

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


Answer: 
No. This problem does not directly teach how side ratios in right triangles lead to definitions of trigonometric ratios. Instead, it involves solving a trigonometric function.

Example 2:
Concept/skill: 
Solve quadratic equations in one variable.

Problem/activity:
Task
Solve the quadratic equation
$$ x^2 = (2x - 9)^2 $$
using as many different methods as possible.


Answer: 
Yes. This task shows one quadratic equation with one variable, x.

Example 3:
Concept/skill: 
Construct a tangent line from a point outside a given circle to the circle.

Problem/activity:
Task
Suppose $A$ is an angle with vertex $P$, as pictured below:
[IMG]
Draw a circle with center $P$ and with  radius $r \gt 0$.  Explain why the circle
meets each ray of angle $A$ in a single point.  Label these points $Q$ and $R$ respectively.
Draw circles with centers $Q$ and $R$ respectively and radius $r$.  These circles meet at $P$ and a second point to be labelled $B$.
Show that ray $\overrightarrow{PB}$  bisects angle $P$.


Answer: 
No. This task does not involve drawing lines that are tangent to circles. The only line that may be drawn is the ray between points P and B.

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

shot_info: fl_problem_001894_neg_0

HS_0

im_task_000870_pos_0

HS_1

im_task_001160_neg_0

HS_2
standard_description: Solve linear equations and inequalities in one variable, including equations with coefficients represented by letters.
problem_activity: Problem 1
a.   Your teacher will read you a series of situations. Explain what new information you get with each one.
Version 1: Mrs. Powell buys a few boxes with some binders in each box. She plans to give out the binders to some students.
Version 2: Mrs. Powell buys a few boxes with some binders in each box. She plans to give out the same number of binders to each student.
Version 3: Mrs. Powell buys a few boxes with some binders in each box. She plans to give out 3 binders to each student.
Version 4: Mrs. Powell buys a few boxes with the same number of binders in each box. She plans to give out 3 binders to each student.
Version 5: Mrs. Powell buys a few boxes with 6 binders in each box. She plans to give out 3 binders to each student.
Version 6: Mrs. Powell buys 4 boxes with 6 binders in each box. She plans to give out 3 binders to each student.
b.   What question do you think this problem is going to ask you to solve? Write the question, then find its answer.
Problem 2
Ten children equally share 40 almonds. How many almonds will 3 of those children get?


aligns: no