Here is an example of a full 40 minute lesson for 1st and 2nd graders.  I always use the same order for all my classes:
Title: Shapes
1)First shapes song - only for listening
2)Shapes PPTX
3)Second shapes song - this song I let them listen to first, then second time they get up and do the actions.
4)Shapes worksheet - put this worksheet up on the board so you can explain it before they attempt it - limit their time for this.
5)Matching Game - Shapes - this game is a back-up plan if you still have time left over.  Students usually love this game!

P.S.  I found these materials on internet, and edited them for my lesson.