- not all schools give teachers time to dedicate to professional learning
- not all teachers are interested in professional growth
- it is not clear what to do in a PLC, even if the first two obstacles are not a concern

In-house professional learning is not in contradiction to learning one can do online or by going to conferences. Learning from experts outside the school is a useful complement to what can be done onsite. However an in-school PLC has enormous advantages:

- It is geared to a specific teachers, students, and school community. Outside Professional Development resources may or may not be a good match.
- It can be coherent, while the catch-as-catch-can off-site PD opportunities are usually disparate and unrelated.
- It is a year-round opportunity for growth.

Over a few years, as teachers gradually cycle through the department offerings in different collaborative teams, ideas are shared, and everyone grows, especially if teachers take notes on what worked and didn't work. Some summer collaboration on the following year's program can help put that information into shared documents, thereby institutionalizing what was learned.

Collaboration meetings are not resented, quite the opposite. They feel useful and important. For more on this, see these slides, and this article.

But what about turning the whole department into a PLC, in a way that does not require years to percolate? Here are some ideas.

**Do math together**

For example, if one of you attends a Math Teachers Circle, bring the problems back to the department. Or find teacher-suitable problems online. On my site, visit Teachers' Mathematics for some ideas. Here are some problems I shared on my blog: K-12 Unsolved, Taxicab Geometry, Scissors Congruence, Geobard Problems for Teachers. Also check out the problems page at the Julia Robinson Math Festival. Of course, there must be many other places to find good problems, for example math competition problems.

**Explore learning tools**

There are many learning tools that can enhance your department's program. Take turns learning and teaching each other. Some tools are electronic (e.g. Desmos, GeoGebra, online applets). Some are manipulative (e.g. Lab Gear, Pattern Blocks). Some are neither (e.g. function diagrams, the ten-centimeter circle.) See my article on a tool-rich pedagogy for some philosophizing on this topic, plus lots of links. Note that some tools will require multiple sessions of your PLC.

**Read and discuss articles and blog posts**

On my site, go to the page about Teaching. I especially recommend the articles on acceleration and assessment, either of which should trigger intense conversations. Or my very practical blog post on lagging homework, and the posts it links to. There are actually hundreds of math teacher blogs, some of which are totally worth talking about. I've occasionally read Michael Pershan's, and Dylan Kane's blogs, and enjoyed them. Find many others on the MTBoS.org site. Or, if one of you is an NCTM member, you should be able to find articles worth discussing in the NCTM journals.

**And more...**

There are obviously other possibilities, such as Lesson Study, or rehearsing Instructional Routines. However I don't know enough about those things to say much about them. If you have links to information about those PLC practices, or other PLC suggestions, please share them in the comments!

--Henri