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Mathematics Methods Algebraic Thinking

The “Growing Dots” Problem

Many of us probably memorized the slope intercept formula (y=mx+b) in middle school without fully understanding how the formula represents linear growth. I was not able to visualize how the formula translated into lines until 11th or 12th grade.

It turns out that, in Japan, some teachers give students an open ended (but supported) problem called the “growing dot” problem to try and build conceptual knowledge that relates to the slope intercept formula. Check out the slideshow below (adapted from a presentation for a Math and Technology class at Boston College) to see how one teacher applied this method to his middle-school students.

Source: Goldsmith, L. T., and Seago, N. M. (2013). Examining mathematics practice through classroom artifacts. 88-96, Boston. MA: Pearson

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Mathematics Online resources Fluency

Building Fluency with Xtramath

One of the main benefits of mathematics is the development of abstract reasoning skills. However, fluency – or the ability to immediately process simple calculations or recognize basic math facts – is also important to develop as students progress through elementary school. Just like being able to recognize words without decoding letters (“sight reading”) aids reading comprehension, fluency with basic math facts can help students master tasks that rely on more abstract reasoning. In other words, being able to automatically add, subtract, multiply, and divide single digit numbers frees up student’s mental resources (specifically their working memory) to focus on more conceptually challenging tasks.

And building fluency is an area where online tools really shine. Unlike a human teacher, online tools can continually and carefully monitor the performance of dozens, hundreds, or thousands of students – their error patterns, response times, and growth rates – and provide each student with material that is designed to boost their performance. One of these tools is xtramath – which allows teachers to tailor specific programs – like division, or subtraction of single digit numbers – to their students, then allow students to work for 5-10 minutes a few times a week to develop fluency. The icing on the cake is that the program is free for teachers and families. You can navigate to their website by clicking the image below:

Clicking will open a new tab.
Categories
Mathematics Online resources Problem Solving

Prodigy Math

Humans are naturally motivated to solve problems, especially problems that they can relate to. Unfortunately, most classrooms limit problem solving activities to word problems in textbooks, which students often cannot identify with. Prodigy is a Mathematics App/Website that develops problem solving skills by tapping into the intrinsic attraction that many children have to games involving quests, wizards, and battles. In the game, students have to answer progressively more difficult word problems to defeat wizards, unlock health and potions, and ultimately defeat a dragon. While many of the problems in the game are similar to ones in textbooks, the ability to the program to adapt difficulty based on previous answers, and rich context in the game still makes this game worth considering for elementary school children.

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Mathematics Fractions Online resources Virtual Manipulative

Fraction Strips

Students who are not yet “fully operational” or able to reason using abstract concepts, can still learn form mathematical concepts with support. They typically need to develop these abstract representations of concepts in three stages, using: 1) concrete representations (like a geo-board) ; 2) semi-concrete representations (like a drawing); and 3) abstract representations (like a formula). While concrete “manipulatives,” like base-ten blocks, are widely used and effective in introducing concepts like place-value, evidence suggests that “virtual manipulatives” can be similarly effective.

Toytheater has an excellent selection of “virtual manipulatives” that students can use online, including a realistic version on fraction strips or fraction blocks. The image below will take you to their website (in a new tab) where you can explore their fraction strip app, along with other virtual manipulatives.

Click on the image to go to toy theater.

Comments and suggestions are always welcome. Thanks for visiting!

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Mathematics Fractions Sheltered English Texts

Text: Introduction to Fractions

Fractions present students in early to middle elementary school with a big challenge. For the first time, they are faced with numbers that do not represent whole numbers, and do not follow the same operational rules as whole numbers. For that reason, in some countries – like Japan – operations with fractions are not taught until students reach fifth grade. In the U.S., the common core standards introduce fractions in third grade, but emphasize developing an understanding of fractions as numbers, and developing a strong intuitive understanding of whole number fractions before diving into addition, subtraction, multiplication, and division with mixed fractions.

The set of texts below are designed to support 2-3 lessons introducing third graders to fractions. The texts focus on connecting fractions to students’ everyday experiences, providing students with concrete experiences working with fractions, and using concrete and semi-concrete experiences to introduce the symbols used to represent fractions.

“Develop understanding of fractions as numbers for fractions with denominators 2, 3, 4, 6, and 8.” (p. 40)…“Understand a fraction 1 ∕b as the quantity formed by 1 part when a whole (a single unit) is partitioned into b equal parts; understand a fraction a ∕b as the quantity formed by a parts of size 1 ∕b”

Related MA Common Core Standards

Why three texts?

Many states require students who are not proficient in English to learn all subjects – e.g. Math, Science, Art, and Social Studies – in English along with native speakers. For teachers, many of whom already struggle to differentiate lesson plans for students with different academic backgrounds, learning styles, and interests, the requirement to teach equivalent content to students at varying levels of English proficiency poses yet another challenge.

The texts below are designed to provide equivalent content instruction (along with content-specific academic language) to students at three levels of English proficiency – early intermediate (“WIDA 2-3”) intermediate (“WIDA 4-5”) and advanced to native speaking (“WIDA 6” and native speakers). The basic template is also designed to be further differentiated in terms of complexity – for example, by using more complex assessments or examples.

In any case, check out the texts below – hope you like them, and don’t hesitate to leave comments or suggestions! [note, links will open a new tab outside of this website]

Categories
Mathematics Methods

A learning video analysis

In Mathematics instruction, the mental processes that are taking place in students’ minds are often as (or more) important than the output that they produce. But, instructions to “show your work” aside, it can often be difficult to evaluate whether a student has fully grasped a concept like a slope-intercept formula, long division, or place value. One way to gain a better understanding of the mental models that students approach problems with is to record or observe students as they attempt to solve (relatively) open ended problems. According to Goldsmith and Seago (2013), this system for gaining insight involves three steps:

  1. Select representations for particular purposes – find out which representations will support your students’ access to the content
  2. Recognize the math involved in a particular representation – for example, students need to know that there are 100 cents in a dollar in order understand  how to use 100s blocks to solve coin problems
  3. Link representations to underlying ideas and other representations – for example, students learn to skip count because they have been asked to memorize the multiples of certain numbers. So, often, students don’t know that skip counting is a form of multiplication

The analysis below examines this video using the three steps listed above. (Note: this exercise was carried out for EDUC7520.01 – Math and Technology in Teaching – at Boston College)

Categories
Mathematics Teaching philosophy

My teaching philosophy for Mathematics

Mathematics is more than just a collection of facts, procedures, and theories.  It is a “way of thinking” that harnesses our innate ability to create abstract representations of patterns, and, by applying reason, discover relationships – for example between a circle’s diameter and circumference – that might otherwise be hidden (Jones, 2012, p. 4; Nelson, 2002). The field of mathematics has become dramatically more complex and important in society over the past 100 years, and a “deep” understanding of mathematics – one that allows mathematics to be applied to all aspects of life – is increasingly necessary to be successful in “education, work, and other areas of adult responsibility” (National Research Council, 2012, p. 1; Toulmin, 2007).

Unfortunately, increasing inequality, in combination with high stakes standardized testing, is preventing many students – especially those who are poor, nonwhite, or learning English – from developing an ability that they could use to escape marginalization (Jones, 2012 p.116-118).  Because of a vicious feedback loop of poor test performance reinforcing lowered expectations among struggling students, entire groups of students often go through school believing that they lack mathematical-ability, and that mathematics is not relevant to their life-plans (Gutierrez, 2013).  In response to this injustice, I seek to develop a deep understanding of mathematics among all students, regardless of what they already know, what social group they belong to, or how much support they have available outside of the classroom.[1] 

My effort to put intention into practice is guided by the work of cognitive and developmental psychologists –like Vgotsky, Krashen, Piaget, and Dienes – who make the case that deep understanding results from students connecting new information to what they already know.[2]  According to this school of thought, to be able to apply math to other aspects of life, students must first actively develop their own mental representations, or schema, of mathematical concepts, then connect these schema to their knowledge of other subjects, including their unique life-experiences (Jones, 2012, p. 34-36).  By first learning how to use mathematical schema in familiar situations, students then gain the flexibility and judgement needed to use the schema in unfamiliar situations (National Research Council, 2012, p. 5-6). 

My instructional method puts cognitive learning theory into practice by challenging students to actively work – alone, with technology, and with others – to solve problems that are both personally relevant and tantalizingly within, but just out of their reach to solve.  Unlike “traditional” classrooms, that mainly teach students how to execute mathematical procedures to arrive at a correct result, my classroom activities help students discover successful processes that they can use to solve problems.  In this environment, “incorrect” answers can yield valuable lessons, and many approaches can be “correct” (Jones, 2012, Ch. 6).  To be successful, this method of teaching requires a deep understanding of each student’s background – academic, psychological, and sociocultural – to develop activities that are both developmentally appropriate and personally relevant. The method also requires a classroom culture where students from all backgrounds feel secure and welcome enough to actively participate in (Harrera, 2016).  In other words, my teaching practices are guided by cognitive psychology and follow a problem-driven approach because this approach is naturally aligned with my goal of developing a deep understanding of mathematics among each and every student. 

[1] The “equity principle” produced by the National Council for Teachers of Mathematics (2000), cited in Jones, 2012, p. 16).

[2] Behaviorism, with its emphasis on developing a consistent response to a stimulus, has limited value in teaching students how to transfer mathematical knowledge to new situations.  Therefore, its role in motivating my practice is limited to situations in which students need to develop procedural fluency through repeated practice.

References

Gutierrez, R. (2013). Why (urban) mathematics teachers need political knowledge. Journal of Urban Mathematics Education.

Herrera, S. G. (2016). Biography-driven culturally responsive teaching. Teachers College Press.

Jones, J. C. (2012) Visualizing elementary and middle school mathematics methods. Hoboken, NJ: Wiley. 

National Research Council. (2012). Education for life and work: Developing transferable knowledge and skills in the 21st century. National Academies Press.

Nelson, E. (2002). Mathematics and Faith. URL: http://www.math.princeton.edu/~ nelson/papers.html.

Toulmin, C. N., & Groome, M. (2007). Building a science, technology, engineering, and math agenda. National Governors Association.