On 27/01/2022, Friday. had only one engage with In 9C class, I introduced the chapter wave motion by familianising the concept 'Waves' through concept attainment model. Give them clues through slide presentation and the concept were developed and activities card were filled and collected. After the concept explained them about the properties of waves. Neena teacher visited the session. Got substitution in 8c in the 4th period. Engaged students with some activities and games. Again got substitution in 9C in the last period. In that class introduced wave motion introductory concepts of the chapter 'wave motion. Completed the assigned duties- both discipline and interval duties.