PowerDirector has a good screen capture program. But unfortunately, there is no option to draw on screen while recording. Have a look for "DemoHelper" in the googling machine of your choice. Maybe that tool fits your needs.
There are other tools for that purpose, like "zoomit" by SysInternals or "Epic Pen". Happy teaching!
Hatti
Win 10 64, i7-4790k, 32GB Ram, 256 GB SSD, SATA 2TB, SATA 4TB, NVidia GTX1080 8GB, LG 34" 4K Wide, AOC 24" 1080