Thesiss

This dissertation examines the relationship between the use of student-centered instructional methods in teaching mathematics and science, and achievement of fourth graders in these subjects. The context for analyzing this relationship is the post-Soviet region, with Kazakhstan …

The elderly population is growing at an unprecedented rate. As individuals age, they may develop life-threatening aortic valvular disease and require aortic valve replacement. The bioprosthesis is the valve of choice for older patients; however, the optimal tissue valve is yet t…