# WeeklyMath Poll – Hybrid Car

Do your students still struggle with word problems? Do they ever ask you “when are we going to use this in the ‘real world’? If so, we’ve got the poll for you! This poll helps guide students through building linear equations that model the cost of two different cars over time, one hybrid-electric, one regular. This post highlights how polls can help you scaffold a problem and also how to use the scratchpad in combination with the prompt in rich math tasks.

The first task presents a word problem with two data points, one where the tank has a full 10 gallons and one where it has 8 gallons a month later.

The first task asks us to compute which car has a lower purchase price. In the scratchpad, I have pasted a picture of a table of values relating to lifetime cost and miles driven. Students can draw on this table or use any of the scratchpad features to compute the cost at 0 miles driven.

Since this problem asks students to figure out which car has a higher purchase price, students need to use the data to find how much the lifetime cost increases for every 50,000 miles and then work backwards to find the price at 0 miles. After students respond, I recommend displaying the results and then having a quick discussion to go over strategies and make sure they all were using a valid method. Students could get the right answer by just looking at the data for 50,000 miles instead computing it for 0 miles. I recommend making sure that students see how to compute that the purchase price of the Hybrid was 28,400 and the purchase price of the Sedan was 24,500. This will be helpful for the next problem where students were asked to model each car with a linear equation.

The scratchpad provides helpful support here in the form of a guided worksheet. Students can fill in the blank like they would in a workbook but now the answers are recorded digitally for you to analyze and organize. If you have students that want to solve it a different way or if they need more space, they can always move or delete the images. If you want use guided worksheets while making your own task, all you need to do is take a picture or scan of a worksheet and upload it in the scratchpad for your task.

If you are worried that your students might not be filling out the worksheet and just peeking at their neighbor’s screen or using other unsanctioned resources, you can always sort responses by work shown. In the example below, four students did not show any work and two of them still got it right, suggesting it might be worth following up with them after class.

For the students who got the task right and showed work, if any of them did a particularly nice job showing their work, you can pull up their response as an exemplar to show the class. You can even save it in the bookmarks (upper left) to show other classes in the future when you run this poll. Notice how this anonymous student used the text editor, the calculator feature and the drawing tool to show their work.

The third and final task in this poll shows how we can use the scratchpad to hold more information like the answer to a previous problem that is used in a subsequent problem. For a teacher led poll, students will not see these equations until after everyone is done with task 2. Note that if you run this poll in student-led mode with the “students see results” set to never, students could go back on their own and change their response.

This poll ends with a question asking them to self evaluate how confident they are in this material, this is a great way to check in and gauge your students while also giving them a valuable opportunity to self evaluate.

This poll helps give some structure to modeling a linear relationship from a word problem and solving a system of linear equations. The scratchpad can help scaffold student work while also providing useful data for you on how they are working through each problem. This scratchpad feature turns polls turn into digital worksheets where students are guided through the intermediate steps. Stay tuned for next week’s math poll where we discuss some exciting new scratchpad features!

As always, we encourage you to modify these tasks and content to align them with your instructional goals. Copy the poll, modify or delete any task, or add new tasks. Please reach out with any questions or comments, we’re here to support you!

Get started by previewing the WootPoll right now, or login to wootmath.com and search for the Hybrid poll in the Shared Gallery.

Visit our page on Formative Assessment for more information on implementing these strategies in your classroom.

Stay tuned for next week’s poll!

# Weekly Math Poll – Fish Tank

This week, we are focusing on how to use features in Woot Math to offer support to students who might be struggling on a given task. This week’s WootPoll uses the context of a fish tank to have students model a linear equation, find the x- and y-intercepts and construct a graph. This poll is quicker than previous weekly WootPolls and can be used as an exit ticket or warm up.

The first task presents a word problem with two data points, one where the tank has a full 10 gallons and one where it has 8 gallons a month later.

Some students will see the rate of -2 gallons per month and be able to translate that to the term -2x. Other students may struggle with how to get started. We encourage you to suggest they use the scratch pad to create a table of values for months and gallons. Then students can extrapolate what would happen after 2 months, 3 months, ect. If you think most students will need this support, you can go to scratchpad settings and add the table into the scratchpad so it will show up in every students’ scratch pad.

The custom legend for this task will also help you identify, among the students who did not get the question right, who is getting the correct slope, the correct intercept or forgetting the negative for the slope. This can help you give rapid feedback and recognize trends in your students’ errors.

The second task asks students to fill in the blanks for the intercepts of y=-2x+10. If students are struggling to compute the intercepts analytically, you can have them use the scratch pad to create a table of values. When there is an expression on the right side header of the table, the table will auto compute the value of that expression. You can create a table that is placed in every student’s scratch pad so they can test points to see what -2x-10 equals for different values of x. In the example below, the values of -2x+10 are automatically computed based on the values of x that are entered.

Students can also use the scratch pad to write out how they compute the x and y intercepts analytically. This can be a great reminder for students about showing their work.

If students need more support, you can save the expression, written out with a header for y-intercept and x-intercept, directly on to their scratchpad. This can be a helpful reminder for your students and will help them keep their work organized.

The final task asks the students to draw a line using the x- and y-intercepts. This task has an option enabled that displays the equation of the students’ graph as they manipulate the line. Students can see when they have the line matched up to the equation y=-2x+10.

We encourage you to modify these tasks and content to align them with your instructional goals. Copy the poll, modify or delete any task, or add new tasks. Please reach out with any questions or comments, we’re here to support you!

Get started by previewing the WootPoll right now, or login to wootmath.com and search for the Fish Tank poll in the Shared Gallery.

Visit our page on Formative Assessment for more information on implementing these strategies in your classroom. Stay tuned for next week’s poll!

# Weekly Math Poll – New Job

This week’s math poll uses the context of a new job and commute costs to learn about systems of equations, functions and linear equations. Students model various situations based on hours worked and price of commute. This poll ends with an opportunity for students to use their computations to make value judgements about if they think the benefits outweigh the costs.

If you don’t want to accept y in place of f(x) you can deselect it. If you don’t want to accept X in place of x (we recommend not making it case sensitive since some keyboards automatically capitalize) you can select the “Match Case” option. Scaling lets you accept larger and smaller versions of equivalent equations.

The prompt asks for the function to be written as f(x) but we decided to allow y as well for correct answers since if the student is getting this close, they are doing the math right and can get feedback later on which form to put it in. But wouldn’t providing this feedback be tedious and hard to scale to my 30+ students?

I’m glad you asked. That’s where the custom legend comes in. Student responses are automatically categorized based on a custom legend that can be tailored to each problem. This task has the following custom legend:

The custom legend looks from the top down so it is important to have the correct answer first. If they did not account for the return bus fare, their response will show up blue on your dashboard. If you want them to have feedback about f(x) vs y without telling them they are wrong you can see who typed y in their answer (regardless of if they were correct) and remind them to pay attention to the prompt. If you want to praise students for getting close by correctly modeling the rate, you can see those responses in green. By automatically categorizing your responses, this task helps you provide more nuanced feedback and move your students learning forward.

The next task has students model the same relationship but as a function of total hours, h instead of hours worked, x. In this case, h=x+2 so replacing x with h-2 will get you the correct answer.

But wait! Isn’t f(h)=15h-40 equal to f(h)=15(h-2)-10? Yup! That’s why this task has no assigned correct answer. After students respond you can display the results and have them discuss (in groups if you want) what they all think the correct answer is. Also, if students finish early, you can ask them to find the other correct answer as a challenge. This task also provides an opportunity to review equivalence and distribution.

In the third task, students model an old job where they made a commission of 20 per sale plus \$10 per hour but are maxed out at \$100 per day. This task, when combined with the next one gives them more opportunities to work on modeling and also adds some variables that take value judgements and let them connect their own out of class experiences. How hard is it to sell a bike? If you sold a lot, would it be worth it to go home early? How many hours a day do you want to work?

The final task has them compute the convergence point of the two jobs. This gives them more data to address the question of if they should take the new job or not. There is no correct answer but you can expect student responses to pull in topics ranging from how many hours they want to work, if they like bus rides or not, if they had a car or carpooled if it would be shorter, and if they value having a higher wage more than convenience.

We encourage you to modify this task and content to align it with similar content. You can copy the poll and modify or delete any task and also make new ones. Please reach out with any questions or comments, we’re here to support you!

Get started by previewing the poll right now, or login to wootmath.com and search for the New Job poll in the Shared Gallery.

Visit our page on Formative Assessment for more information on implementing these strategies in your classroom. Stay tuned for next week’s poll!

# Weekly Math Poll – Head Start

Welcome to our first #WeeklyMathPoll. These are designed to help stimulate discussions about mathematics while giving you valuable data on your students’ thinking. You can use it as a warm-up, exit ticket or build an entire lesson off of it. Feel free to copy the poll to your account and modify as you see fit. If you want help aligning it to a different grade level, tweet at us @WootMath or email polls@wootmath.com.
This week’s math poll is a problem about a foot race between Amy and Spencer. The poll is aimed at getting students to think about multiple solution paths to this rates problem. The answer can be given in either distance or time for the head start. Also, feel free to discuss questions like acceleration time or assigning different start locations to make the race close.

The first question accepts answers with or without units (we want to give more entry points for success, feedback on units can come separately). If you want to assess the units, feel free to modify the accepted answers or create a task that asks them what the units should be if the answer is 20. You can also review student work and praise someone for getting the right answer, then praise someone else for using the right units.

This task also has a custom legend of common responses so if a student gets the number correct but spells the unit word wrong, they will be coded as blue (misspelled seconds but still had a 5 in their answer) or yellow (misspelled meters but still had a 20 in their answer). This can let you decide how important spelling is and distinguish spelling fluency from mathematical fluency. Better data means better feedback.

The following table also presents some examples of student strategies for task 1. Student A has given the correct answer in meters, shown their work and used fractions to solve the problem. Student B has divided the distance by each rate to find the time for each to finish. Student C has done similarly but using s for Spencer’s time and a for Amy’s time.

We encourage you to use the display student work feature to review examples in a whole class setting. This lets students see that they are not alone and that others can make similar errors or take different but also valid approaches to the same problem.

The next task asks them to tap on the line that represents Spencer’s distance to the finish line over time. Answers close to the convergence point are not accepted because we want students to select an answer where we know which line they mean, not one answer that could be interpreted as multiple lines.

This task also has the opportunity for you to discuss what would happen if you extend Amy’s line (the blue one) back to the y-intercept. A great question for students who aced this: “If you want them to start at the same time how many meters from the finish line does Amy need to start?” Specify that this is not a head start, it actually means they run different distances so it is more of a handicap than a head start.

The final task has two correct answers, B and D. This is designed as an opportunity for you do have a discussion about why they are both correct. You can talk about how B represents a 5 second delay for Amy and how D represents a race where Amy has to run an extra 25 meters. Students might choose E because of the head start of 20 meters or C because of the 5 second head start.