Introduction:
An introduction to what sparked the original thought, but this essay has not gone where I originally intended it to go.
A thought, not intended to reflect on anyone, especially not myself as I tend to be very insensitive. I prefer to deemphasize the money aspect of, “poor families”, and say “intentionally marginalized communities”. The trends we see in neighborhoods such as these aren’t from lack of money, or color of skin, or religion, or music, or drug/alcohol use, or anything that could be considered personal failures, it comes from the structure of our political and economic system that seems to require that certain groups get held back in contrast to others. (maybe this already happens I don’t know)
I happen to work in one of these marginalized neighborhoods. I don’t think public education is serving my students very well. The lack of change that I have been able to bring about, heck, the lack of discussion on how to educate our children, is one of the strongest drivers of my unhappiness not just in work, but in life itself.
I read on page 146 and 147 of Fair Isn’t Always Equal by Rick Wormeli:
“I worked for several years in a low-performing school with a high concentration of students from poor families. Many students were also involved in violent gangs. When I later moved to a school with students from more affluent families, I realized how much lower my expectations had been for the students in the first school. The truth is that I didn’t know how to teach them well, and I was just plain tired of fighting all the battles. It seemed kinder and easier to not expect as much from them. I look back on that experience and I cringe. (emphasis mine)
This quote comes from Section III GRADING Chapter 11 “The Relative Nature of Grades and Their Definitions”
I’d summarize the chapter as basically:
- Grades are a terrible measure of learning
- Grades often are confused with tools for motivation
- An “A” can mean above standard or meeting standards depending on the school or teacher
- Grades are often used as feedback when they are supposed to represent post-learning achievement (Grades aren’t part of learning)
It was about 11 years ago when I was drawn by the idea that you can teach calculus to a 5 year old. (https://www.youtube.com/watch?v=rNx6G-9GKPE). So the idea that I can teach 8th grade math to anyone willing to learn doesn’t seem like an impossible task. As Dr. Nellie Deutsch was developing her family math website and refining this very concept. I used those tools with my own kids and once or twice with nieces and nephews. https://naturalmath.com/goods/
While the last of those kids is in high school and all of them have decent math skills (one niece is even majoring in math) I doubt that my introductions to advanced math concepts had anything to do with it, especially because the nieces and nephews only saw me at most once a year. More likely they are all successful students because they all grew up in non-marginalized communities. (Source: Many discussions I’ve had with my brother-in-law on the nature of education and the quality of schools our children were enrolled in). Sure they all have parents who love them, they have supports, they all have everything you’d hope all children had, meaning they will require a good bit of therapy to become normal, but should be able to get decent jobs and live at least moderately happy lives. More importantly for this essay, they were all at or above grade level for at least most of their educational careers.
Thoughts on Teaching:
First a note. If you’ve never taught you may not understand that teaching a class is not particularly difficult. What is difficult is getting to know students and adjusting for them. That is what this essay is about. I spent a good 8-10 hours on day 1 writing this, then a couple more hours on day 2 and 3 trying to finish up. The hard part is thinking about what or how this will impact my classroom. Because, this is a real problem that has been consistent. A sizable number of my students struggle with slope. It seems so simple: steepness of a line, ratio of how far a line goes up or down vs the distance over.
I’ve thought about it in the past and tried different things, none of which has been very successful. What I’m thinking about today, who knows if it will be successful later this year. It is frustrating to teach what seems to be a relatively easy and straight forward concept only to have students just forget it the next day.
Why? I don’t really have an answer for this. I wish I did because it keeps happening to me and my students. This is where the essay turned from; “offended that teachers are going easy on kids because they are poor”, to, “do I really know what I’m doing? Let’s examine a common complaint about how my lessons aren’t working and try to revise that basic lesson.”
A simple example
Take the basic concept of slope of a line. It starts simply as rise over run riserun. Take two points on a line and count up from one point then over to the other set that as a ratio and you’re done. Draw a little picture on the board of a slope triangle for visuals and it really seems simple. Slope formula follows as a logical extension if you don’t happen to have a graph handy, or your coordinate points aren’t composed of nice whole numbers you can still find slope by thinking of how far up or down vs how far over. Starting with a simple picture of a triangle seems like it should be easy to remember and picture in your head when doing work in the future.
How students do it wrong?
First, students can’t find two points on the line. They just stick a dot anywhere. (While they are technically correct it does no good here.)
Second, students don’t draw a right triangle or often not a triangle at all. For example, they tend to draw too far up so when they go over they are above the second point, then they draw down to the second point. This is not a triangle, just an irregular four sided figure.
| Expectation | Reality |
| Slope of 412 reduced to 13 | Slope of 510 or something |
Reflection
From this example I can really see that I’m assuming students have a base of knowledge, but I’m also assuming that I’m breaking down a concept to its purest form, when I’m doing neither of those things. (Give me a moment I’m learning what I’m doing as I’m writing this).
Why does this happen?
- Students aren’t using the points with whole numbers and coordinates that we can identify.
- It is possible they do this because they aren’t comfortable finding and naming coordinate points on a graph.
- Students don’t make points on the graph lines so they ignore the coordinate plane and focus on connecting the points.
- Do students realize it should be a triangle?
- Do students realize a right triangle is important?
- While ratio isn’t supposed to be a confusing word, it really is (Sometimes texts use the word quotient, but that is even worse.)
- Should I say make a fraction with the numbers? I’ve tried.
- This is how to find a slope, it does nothing to help students understand what the concept of a slope is. It feels like we are teaching what slope is, but all we are really doing is telling students slope is the ratio of change in the value of y and the change in the value of x, then showing that slope can be the triangle made when we pick a point on a line and then go up and over to a second point on the line.
Finding the slope of a line didn’t start out disconnected. Generally I start with a line or two and ask, “How do we find a way to determine which line is steeper than the other?” I probably didn’t give enough time to think about the question, “What do we mean by steepness?” I probably just took a bunch of lines and said which is steeper, which everyone could do. Then said how do you know and jumped on the first kid who said something along the lines of this line goes up faster. Then it’s here is the up and here is the over the more up and the less over and you got steeper.
When a teacher has students with a solid 7th grade math background this is enough. When a teacher has students without any solid math background it’s enough for today, but not for holding in memory to be used tomorrow.
I stopped here and asked chat GPT: how would you teach finding slope of a line using inquire based methods to 8th grade students who are more than 3 grade levels below in math achievement
The AI is making a lot of the same mistakes.
So what am I doing that needs to change:
- Assuming knowledge (Yep, students should have some base knowledge, so where can we start assuming they know something? Yeah, diagnostics, but my students test between kindergarten and 5th grade in many classes so again where do we start assuming knowledge)
- When taking things to a graph make sure to connect coordinates with values. Maybe show in some way that we cannot know the exact coordinates of a point not on a grid.
- Maybe show that measuring distance between two points on the graph can be done but one point not on a graph line then it can’t be done.
- Name it slope triangle right away.
- Making the triangle isn’t required for understanding or doing, but will be useful sometimes in the future so exposure is nice, it just isn’t the goal of the lesson.
- Not spending enough time exploring the concept of steepness and instead leading students towards the answer you want riser/un
- One of the ways to compensate for lack of background math knowledge is to start very concrete and let the students dictate when we move more abstractly.
- Start with simple proportional ratio problems from 7th grade
- How can we write the ratios
- How can we compare two different ratios
- Ask questions about which is increasing faster
- Where and when does practice fit in?
- Seriously, students who most need practice don’t.
- Most of class is spent introducing this idea often because the background math isn’t there so we are building from the very bottom.
- Homework generally isn’t done.
- Stop using I do, we do, you do
- Build from concrete
- Write notes with examples
- Finish with what did I learn
- Prove it with intentional practice
Rethinking the concept
I’m starting to think that we don’t know how to teach “these” kids because we aren’t building a curriculum for them. We have a curriculum for “regular” students, but not students who have been going to school designed to marginalize them.
When exploring advanced math concepts to my own kids I didn’t really think about building a base of knowledge and I knew there was nothing to build on. I also didn’t care if it connected with anything because for the most part they weren’t even in school. In the classroom most lessons are built with the assumption that there is something to build on and that something else will come after. While there is always something to build on with students, where that solid ground starts is often variable. The point of entry must be open.
When teaching a concept we start with the basic concept, but also need to explore edge cases.
- What if both start with zero? Or a million?
- What if the slopes are almost the same?
- What if I don’t have access to numbers?
- Really big slopes.
- Really small slopes.
- Comparing slopes.
- Slopes with whole numbers.
- Negative slopes.
- Zero slope.
- Vertical slope.
Also: When will we use this concept?
- What are the ways we will use the concept?
- Where does it fit in on the total range of math education?
- What came immediately before?
- What will come next?
- What is the larger concept(s) we are teaching related to this?
- Is there a specific strategy that students should know (slope triangle)?
Let’s just think of the seemingly simple concept of using a slope triangle to find slope, but connecting it to what is slope and how will we make the leap to using the slope formula.
The slope triangle isn’t important in itself, as a method to find slope. It is an algorithm such as you would use to multiply larger numbers, but that algorithm can be useful for comparing slopes, and proving that slopes on a straight line are the same all over, and that triangles are similar, but not congruent. So the triangle is important, but not required. Our lesson objective then would be along the lines of: using a graph to determine the exact slope of a line.
I have kind of a lesson from here till almost the end, but not something I would teach from. Think of it as a proto-lesson. An idea I’ll save until we get closer to this point in the curriculum and flesh out then.
Warm up
Starting with the first point assuming knowledge. When we make things more concrete then they become more manageable for students with less background knowledge. Sometimes it is called a lowering barrier of entry. I want to start with comparing the steepness of two lines with an objective measurement.
| Which line is steeper? | What do we need to do to help? Zoom in ok? | What makes this so much easier? | Can you give a number for the steepness? The number has to tell me which line is steeper even if I can’t see the lines. |
The last picture and question are important in building a purpose for the inquiry to follow.
Inquiry
Exploring steepness
This is the part of the lesson where the big mistake is thinking too much about what the students are doing. They are doing, but the doing is supposed to help them think. The doing has to lead to thinking and the thinking has to be specific?
We need to have a reason for slope or it won’t be remembered. Students may not realize that a line on the graph represents more than just an object floating out in space (cannot assume knowledge). At this point we want to bring in the axis lines and labels of our graph to add context (This is like character development in a story and helps us remember the overall story line). Students don’t have to talk about lines and points and steepness. They can talk about the number of plants per square feet. (This is even better if you can use real data on any two ratios. The problem with real ratios is often that they are not pretty and don’t use whole numbers. The problem with not using real ratios is we start ugly then adjust our numbers to make it pretty and that has all sorts of problems, like the question, why are we doing this?). Comment: Notice the steeper line is mostly under the other line, this is so we don’t accidentally equate steepness with on top.
I really want students to think and be able to answer the basic questions
- What is the steepness of each of the lines?
- How can you communicate that steepness without showing the graph?
- Is that communication intuitive?
- Like if you tell me blue is something steep and orange is something steep, can I know that orange is steeper than blue?
- If it is more steep how do I know without you telling me?
For this particular graph I might ask questions like:
- Which is better for a small apartment but I love plants?
- Which one is better if I want the biggest garden ever and space is not a problem?
What answers might the students come up with? Where will the students be working? How will we get everyone to the correct answers? This case being rise/run?
At this point I realized the last 30 minutes or so of work will probably be tossed. I’ll keep the warm up, but go in a slightly different direction for discussion.
The thing is with a problem like this student answers will come fast and they will want to know if they are right or wrong right away? I need a good question or questions that have an answer that is intuitively correct, but is not obvious.
Now I’m looking at the graph and thinking I want to change a couple of things so I can develop a better question. What if I changed the axis to height and distance and instead of talking about plants we were talking about wheelchair ramps? Now my students will care about how steep the line is because they have to figure out if it is too steep to push a wheelchair. If we had time and resources we could even play around with a wheelchair. We could at least say engineers did this in real life. I should also look up how steep a standard wheelchair ramp is (it is a 1:12 ratio).
Maybe I can’t get to a question that gets them to a slope directly. Instead I might say that the ADA has a requirement that the slope of a wheelchair ramp cannot exceed 1:12. What does that mean?
I saw a sign on the road telling me to slow down, there was a 14% grade up ahead? What does that mean?
I’ve got it as a colon and a percentage. I need it as a fraction for future work. I’d also like the slope triangle thrown in there.
Recap a bit for myself because it’s been a few days. Warm-up with a couple of lines and ask students which is steeper and how can you tell me if I can’t see the lines. Followed by slope from ADA wheelchair ramps and road signs. What do they mean and how are they the same and different from our warm up?
If we put the three examples next to each other we can talk a couple of minutes about how they each are excellent for their particular use case. Then decide that the use of graphs leads us naturally towards the use of difference in y-coordinates and x-coordinates. This requires the knowing of where the point is on the line, the use of the graph lines, and the creating of a triangle.
I have smaller whiteboards on the walls so I might give groups a couple of lines and ask them to tell me the slopes. Each group can have a different line. They have 5 minutes to determine the slope. Then one by one we can have groups tell us the slope and what number to start on the y-axis and see if the other groups can draw their line correctly. A different person each time for each group.
Ask generally what were the key points making sure we generally describe drawing a slope triangle. Have students take notes in their notebooks, including at least two examples. Name today’s notes, “finding slope on a graph with the slope triangle strategy.”
At home practice with answers on the LMS to check.
Yea, thanks for taking this journey with me. Now how do I put all of this thinking into the hour a day I have for lesson planning?
Conclusion
This essay is getting so long and taking so much time because it has morphed. The problem is I focused first on the second half of the sentence “…I was just plain tired of fighting all the battles.” (Wormeli pg 147). I hear complaints all the time about these battles; students not doing their homework, not paying attention in class, talking in class, reteaching the same lesson a million times in a row, because the students are just not getting it. When it turns out I should have been paying closer attention to the first part of the sentence. “The truth is that I didn’t know how to teach them well, …”
I don’t want to say I don’t know how to teach the students, or how to differentiate, or simply how to teach. The thing is, often I’m afraid that is just the simple truth. It’s not just me though, I don’t think education is built for my students. Which brings us back to the beginning. Students in intentionally marginalized neighborhoods do not get the education they need.

