few_shots: 
Example 1:
Concept/skill: 
Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.

Problem/activity:
Task
Materials
One 10-frame per pair of students (see example below)
[IMG]
Counters, 10 per pair of students
Decks of number cards 0-5 (with 4 of each number) or two 0-5 dice
Setup
This activity is done in pairs. The students sit side by side with 10-frame and deck of cards or dice. If they have cards, the cards are shuffled and placed face down in front of them.
Action
Player 1 flips a card or rolls the die. They place that many counters on the 10-frame. Player 2 flips a card or rolls the die. They place that many more counters on the 10-frame next to the counters already on the ten frame. The students count the total together.
A recording sheet can be added when the students have been introduced to equations and number sentences. For those students who can handle higher numbers, a deck of 0-10 cards and two 10-frames can be used.
This game can also be played alone.


Answer: 
No. Though this task involves addition, it does not involve any word problems.

Example 2:
Concept/skill: 
Apply and extend previous understandings of multiplication and division and of fractions to multiply and divide rational numbers.

Problem/activity:
For each pair of numbers, determine if the values are equivalent. Explain your reasoning for each one.
a.
$$-0.25$$
and
$$\frac{1}{-4}$$
b.
$$-\left ( \frac{1}{4} \right )$$
and
$$\frac{-1}{-4}$$
c.
$$\frac{-1}{4}$$
and
$$-\frac{1}{4}$$


Answer: 
Yes. This problem involves understanding fractions and division to divide rational numbers, such as 1, -4, 4, and -1. This problem also involves an understanding of multiplication: if p and q are integers, then -(p/q) = (-p)/q = p/(-q).

Example 3:
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.

Now, determine whether the following problem or activity can enable students to understand the concepts or skills in the provided description.

shot_info: im_task_001477_neg_0

K

fl_problem_001097_pos_0

7

fl_problem_001894_neg_0

HS_0
standard_description: Use the unit circle to explain symmetry (odd and even) and periodicity of trigonometric functions.
problem_activity: Categorize each representation of a function as linear, exponential, or quadratic. Explain your reasoning for each one.
|                                                                                                                               a.                                                                                                                               |                                                                                                                             $$x$$                                                                                                                              | $$y$$ | 1 | -2 | 2 | 1 | 3 | 6 | 4 | 13 | 5 | 22 | b. | $$x$$ | $$y$$ | 1 | 48 | 2 | 24 | 3 | 12 | 4 | 6 | 5 | 3 |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------|---|----|---|---|---|---|---|----|---|----|----|-------|-------|---|----|---|----|---|----|---|---|---|---|
|                                                                                                                             $$x$$                                                                                                                              |                                                                                                                             $$y$$                                                                                                                              |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
|                                                                                                                               1                                                                                                                                |                                                                                                                               -2                                                                                                                               |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
|                                                                                                                               2                                                                                                                                |                                                                                                                               1                                                                                                                                |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
|                                                                                                                               3                                                                                                                                |                                                                                                                               6                                                                                                                                |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
|                                                                                                                               4                                                                                                                                |                                                                                                                               13                                                                                                                               |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
|                                                                                                                               5                                                                                                                                |                                                                                                                               22                                                                                                                               |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
|                                                                                                                             $$x$$                                                                                                                              |                                                                                                                             $$y$$                                                                                                                              |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
|                                                                                                                               1                                                                                                                                |                                                                                                                               48                                                                                                                               |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
|                                                                                                                               2                                                                                                                                |                                                                                                                               24                                                                                                                               |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
|                                                                                                                               3                                                                                                                                |                                                                                                                               12                                                                                                                               |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
|                                                                                                                               4                                                                                                                                |                                                                                                                               6                                                                                                                                |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
|                                                                                                                               5                                                                                                                                |                                                                                                                               3                                                                                                                                |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
|                                                                                                            c.                       $$f(x)=x(x-4)$$                                                                                                            |                                                                                                         d.                       $$f(x)=4-{x\over2}$$                                                                                                          |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |
| e.            |https://d37su8u1z9ynie.cloudfront.net/uploads/2018/07/02/alg1_u7_l1_tte.PNG|  |https://d37su8u1z9ynie.cloudfront.net/uploads/2018/07/02/alg1_u7_l1_tte.PNG| image:: https://d37su8u1z9ynie.cloudfront.net/uploads/2018/07/02/alg1_u7_l1_tte.PNG | f.            |https://d37su8u1z9ynie.cloudfront.net/uploads/2018/07/02/alg1_u7_l1_ttf.PNG|  |https://d37su8u1z9ynie.cloudfront.net/uploads/2018/07/02/alg1_u7_l1_ttf.PNG| image:: https://d37su8u1z9ynie.cloudfront.net/uploads/2018/07/02/alg1_u7_l1_ttf.PNG |       |   |    |   |   |   |   |   |    |   |    |    |       |       |   |    |   |    |   |    |   |   |   |   |


aligns: no