Summative assessments - tests, quizzes, and other graded course activities that are used to measure student performance. They are cumulative and often reveal what students have learned at the end of a unit or the end of a course. Within a course, summative assessment includes the system for calculating individual student grades. 
Formative assessment - any means by which students receive input and guiding feedback on their relative performance to help them improve. It can be provided face-to-face in office hours, in written comments on assignments, through rubrics, and through emails. 

Begin the lesson with an interesting fact. Exude enthusiasm when delivering a lesson.
Ask the students questions: Have you ever? How would you feel if? Turn lessons into games.
Students learn best and are most engaged when they are having fun.

My goal is to implement more teaching teckniques that will prove useful and effective for the students and become a better teacher everyday.