Well start is half done!
If a teacher is able to capture attention in the beginning of a lesson then half of the job is done. This means the first two classes of a Math lesson are very crucial. There are various methods of beginning a Math lesson in a creative manner.
#1 Making a connection- Everytime it is not essential that we are going to start a new concept. Students have some knowledge about it earlier. So, forming a connection by asking questions based on previously gained knowledge of students is a tried and tested strategy which helps in motivating students for further learning.
#2 Showing a picture - A picture says a thousand words. In a math class, one may begin a lesson by showing a picture from surroundings showing the use of some Math concept leading to introducing new concept.
#3 Story telling - This helps a lot in the beginning of a lesson. I believe we as teachers need to capture attention of students so that their focus is on the new topic. Story telling is indeed a good way to start a lesson.
#4 Realising the need to learn- Why we are learning this concept ? Why it is important ? This must be answered in the beginning.
#5 Involving students - Calling students names in between , taking their help ,taking their examples helps in capturing attention till the end of class.
#6 Showing real objects - Sometimes it is feasible to carry real objects in a classroom. Students may be asked to look around themselves to observe things also.
It is the way how a topic is introduced which matters a lot.