Are we happy with questions about teaching numbers to preschool students? What about questions about teaching graduate courses or advising math Ph.D. students?
I would encourage questions about mathematics pedagogy and teaching for all age groups (from toddlers to adults), all educational levels (pre-school to graduate), all settings (homeschool to traditional school), and even those with special needs (gifted, with disabilities, etc.).
I don't know if we will be able to attract participants interested in this wide range to this proposed site, but I don't think we should limit the scope at the start.
I don't think that we should limit the scope at all. I recently had to teach some adult students very basic math concepts such as addition, subtraction, multiplication, and division of integers, fractions, and decimals. It can be a difficult concept to convey to some learners with learning disabilities. It was a challenge for me to find new ways to explain these concepts to help the students that struggled, and I would have loved to have had an open forum to discuss different ways of teaching these concepts.
Where I go to school the faculty look down on the 6-8 Mathematics PhD students who are doing research in Mathematics Education. Being labeled as "Math Ed" means that you are lower than the lowest first year "Pure Math" grad student who got a B in algebra. I would love to see a group that is open to all levels of Mathematics Education Professionals so that we can help each other assist all students at all levels.