In many countries there are subject associations which give members access to journals and knowledge sharing events. We recommend that you join your subject association. In addition, there are specialist bodies which publish high quality research summaries addressing issues relevant to teachers.
For example, UNESCO produces Educational Practices Guides. See for example:
Behaviour promblems: Preventing behaviour problems: what works
Creative thinking: Nurturing creative thinking
Development of intellect: Understanding and facilitating the development of intellect
Economically disadvantaged students: Task, Teaching and Learning: Improving the quality of education for economically disadvantaged students
Educational practices: Effective educational practices
Emotions: Emotions and learning and Academic and social-emotional learning
HIV/AIDS: Preventing HIV/AIDS in schools
How children learn: How children learn
Instruction: Principles of instruction
Languages: Teaching other languages and Teaching additional languages
Learning in the 21st Century: Guiding Principles for learning in the 21st century
Maths: Maths Anxiety, Effective pedagogy in mathematics and Improving student achievement in mathematics and Teaching fractions
Motivation: Motivation to learn
New media: Using new media
Parents: Parents and learning
Philosophy: Philosophy for Children
Pre-school language: Promoting pre-school language
Reading: Teaching reading
Safe and Welcoming Schools: Creating a safe and welcoming school
Science: Teaching Science
Social sciences: Effective pedagogy in social sciences
Speaking, listening and writing: Teaching speaking, listening and writing
Teacher development: Teacher professional learning and development
Teaching: Teaching
Tutoring: Tutoring