This issue consists of 25 articles from 57 authors affiliated with 15 institutions from 8 countries including:

• Nigeria (Al-Hikmah University Ilorin; University of Ilorin; Kwara State University)
• Russian Federation (Moscow Polytechnic University)
• Indonesia (Universitas Pendidikan Indonesia; Trisakti Institute of Tourism; Universitas Negeri Surabaya; Universitas Brawijaya; Institut Teknologi Bandung)
• Bangladesh (Nizam Uddin Ahmed Model College)
• Uzbekistan (Presidential School of Uzbekistan; Tashkent State University of Economics)
• Philippines (Notre Dame of Tacurong College)
• India (Osmania University)
• Armenia (Institute of Arts of National Academy of Sciences of Armenia)

This issue consists of 21 articles from 49 authors affiliated with 12 institutions from 7 countries including:

• Indonesia (Universitas Pendidikan Indonesia)
• Nigeria (University of Ilorin; Bamidele Olumilua University of Education, Science and Technology; Federal University Dutsin-Ma; Al-Hikmah University Ilorin)
• Japan (Hiroshima University)
• Pakistan (University of Central Punjab)
• Philippines (Sultan Kudarat State University, Notre Dame of Tacurong College)
• Russian Federation (Moscow Polytechnic University)
• Uzbekistan (Termez State Pedagogical Institute, Tashkent State University of Economics)

This issue consists of 27 articles from 79 authors affiliated with 20 institutions from 10 countries including:

• Indonesia (Universitas Pendidikan Indonesia, Universitas Islam Negeri Sunan Gunung Djati, University of Brawijaya)
• Zimbabwe (Ruya Adventist High School)
• Qatar (Community College of Qatar)
• Brunei Darussalam (Universiti Brunei Darussalam)
• Japan (Hiroshima University)
• Nigeria (Al-Hikmah University Ilorin; University of Ilorin; Bamidele Olumilua University of Education, Science and Technology; Federal University Dutsin-Ma; Yusuf Bala Usman College; Science and Education Development Institute; Landmark University Nigeria; Federal College of Agriculture Nigeria)
• Philippines (Sultan Kudarat State University)
• India (Rajarambapu Institute of Technology)
• Bangladesh (Jagannath University, Bangladesh Open University)
• Russian Federation (Moscow Polytechnic University)

This issue consists of 26 articles from 84 authors affiliated with 12 institutions from 8 countries including:

• Indonesia (Universitas Pendidikan Indonesia)
• Qatar (Community College of Qatar)
• Brunei Darussalam (Universiti Brunei Darussalam)
• Nigeria (University of Ilorin, Al-Hikmah University Ilorin)
• Zimbabwe (Ruya Adventist High School)
• Japan (Hiroshima University)
• Pakistan (University of Agriculture Faisalabad, Islamia University Bahawalpur, Cholistan University of Veterinary and Animal Science, University of Agriculture Pakistan)
• Vietnam (Ho Chi Minh University of Technology and Education)

This issue consists of 27 articles from 100 authors affiliated with 14 institutions from 10 countries including:

• Indonesia (Sampoerna University, Universitas Pendidikan Indonesia)
• US (The University of Arizona)
• Nigeria (University of Ilorin, Al-Hikmah University Ilorin)
• Zimbabwe (Ruya Adventist High School)
• Philippines (Sultan Kudarat State University)
• Pakistan (Riphah Institute of System Engineering, University of Education
  Pakistan, COMSATS University Islamabad)
• India (Rajarambapu Institute of Technology)
• Qatar (Community College of Qatar)
• Brunei Darussalam (Universiti Brunei Darussalam)
• Japan (University of Tsukuba)

This issue consists of 26 articles from 109 authors affiliated with 10 institutions from 6 countries including:

• Indonesia (Universitas Pendidikan Indonesia, Universitas Komputer Indonesia, Sampoerna University, Universitas Pakuan)
• Malaysia (National Institute of Educational Management and Leadership)
• Qatar (Community College of Qatar)
• Japan (Japan Advanced Science and Technology, Gifu University)
• US (The University of Arizona)
• Thailand (Rajamangala University of Technology Thanyaburi)