This blog is my contribution to narrowing the gap between research and practice in mathematics teaching and learning. It contains teaching tips based on current reforms in mathematics education such as teaching mathematics through problem solving (TtPS), developing higher-order thinking skills (HOTS) and mathematical habits of mind, constructivist teaching, scaffolding learning, etc.

I love to develop mathematical tasks and activities that involve basic mathematics concepts but has the potential to engage both teachers and  students in higher level thinking. I am particularly interested in students’ learning trajectory in algebra, geometry, numbers, combinatorics, etc.

My work includes doing research in mathematics teaching, writing curriculum materials and facilitating professional development programs for mathematics teachers. I taught mathematics for 8 years before my current work.

Mathematics for Teaching was initially my online notebook but comments and traffics encouraged me to share more my ideas. My other blog, K-12 Math Problems is written for students. It contains problems, solutions, explanations, and common errors. Teachers will also find it useful. Math Ed Studies, my third blog is more like my notebook, my nth attempt to organize what I read. My computer crashed twice last 2011. Thanks to the blogs. I don’t have to reconstruct everything.

Why the ads? The blog has to pay for the domain and hosting. I would appreciate your donation for the technical maintenance of the blog.

Erlina Ronda

Use the space below to e-mail me or email me directly at mathforteaching@gmail.com

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I'm a math teacher, researcher, writer, and facilitator of professional development for teachers. Email me at mathforteaching@gmail.com.

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1. Check my post on subtracting integers using numberline. The first number is the initial position hence start at -4. The minus sign is to be interpreted as going to the left. The sign of 7 which is negative is to be interpreted as do the opposite. This means instead of going to the left as instructed by the minus sign you go to the right by 7 units. This process can also be represented by -4 + 7. In my post I described why I do not advise this way of teaching subtraction operation using directed distance because there are too many rules to remember.

Check my other three posts on subtracting integers. Thank you.

2. How would you show -4-(-7) on the number line using directed difference