This week I was teaching my G11 students the Genetics section of the syllabus and showed them an online narration on sickle cell aneamia. I thought I would share the website from which it came.
From there if you go to the HippoCampus link on the top right you come across some excellent online resources
I then went straight to biology
Check out the courses which takes you to a series of folders
with resources or alternatively work through textbook correlations
And perhaps try their online simualtions
I think you will be pleasantly surprised.