These are outstanding resources for every Social Studies teacher.
The Big Six Historical Thinking Concepts by Peter Seixas and Tom Morton is aligned with the redesigned Social Studies curriculum and provides practical ways for teachers to introduce and embed the curricular competencies.
Making Thinking Visible by Ron Ritchhart et al introduces research-based strategies that deepen students understanding through a culture of thinking.
The Anthology of Social Studies: Issues and Strategies for Secondary Teachers by Roland Case et al. includes many activities and theory that are essential to effective social studies classrooms.