The aim of this research is to reveal the opinions of teachers about the development of assessment activities in updated educational conditions. The study was conducted with the phenomenology pattern, one of the qualitative research designs. The study data were collected with semi-structured interview forms applied to primary, secondary and high school teachers. The participants of the study consisted of 20 primary school teachers, 20 secondary school teachers and 20 high school teachers who were working in various schools in Kazakhstan in the 2021-2022 academic year and agreed to participate voluntarily in the research. As a result of the research, among the answers given to the question about the advantages of online education -- financial advantages, time advantages and transportation advantages -- the majority of the participants answered the question as financial advantages. Among the answers given to the question about the disadvantages of online education -- adaptation problems, problems in social relationships and connection problems -- the majority of the participants answered the question as connection problems. Among the answers given to the question about the advantages of evaluation activities in online education -- speed-time advantages, storage advantages and alternative methods' advantages -- the majority of the participants answered the question speed-time advantages. Among the answers given to the question about the disadvantages of assessment activities in online education -- connection problems, cheating and distractions -- most of the participants answered cheating. Among the answers given to the question regarding the development of assessment activities in online education -- improving technology, establishing a counselling unit and preventing copying -- majority of the participants answered the question as improving technology.