Please go to the following website KhanAcademy.org where you will find most subjects explained from very basic to an advanced level.
Most of the videos are about 10 minutes. I feel sure that you will find all your math and science educational needs explained step by step.
I hope this...
Background singing
I hope that there is no background noise such as singing making it difficult to follow the otherwise an extremely interesting story. When people are talking there should be no background distractions whatsoever. It is extremely difficult to follow the speaker.
To learn to recite prayers
Asalamu Alaikum Sister,
Please visit the following website Quranicsciences.com where you will be able to learn how to pray and also the suras word by word. You will also be able to learn to read the Quran.