unparalleled support and invaluable guidance throughout the study. The constructive remarks and comments on each phase of the dissertation contributed to the fruitful outcome of this research.• Prof Nyna Amin, thank you for supporting me. May God favor you with good health and abundant life.• My family, for the support they gave me during the long academic journey.• The Former Director of Education in Eswatini, Dr Sibongile Mtshali, for allowing me to carry out the research in the schools.• The Head teachers in the four high schools where the research was carried out: thank you very much for being cooperative.• The pupils who availed themselves for the research: thank you very much; likewise, to the parents for allowing your children to participate in this research. May you be blessed by the Lord.• All my friends, who too many to mention, thank you for the different roles you played in encouraging me through this long journey.