Make time to have fun in math class!
This is a free collection of short video clips to support geometry instruction at the elementary level.
There are over 35 clips here covering a wide range of scenarios with polygons.
Each video clip asks the student to tell how many sides there are in a given situation.
The clips start off at the most basic level (eg "How many sides in a pentagon?"), progressing later to more challenging questions (eg "How many sides in 3 triangles and a rhombus?").
These clips are great for vocabulary practice and mental math.
As with all my resources, this collection is created by me, a veteran teacher dedicated to the philosophy of improving math fluency and skill mastery through fun!