As a native English speaker, I teach all my lessons in English.

It entirely depends upon where the child is at with their knowledge and grasp of the foundational skills. It also depends how much anxiety the child may have around the subject.

Each session is typically one hour. I recommend one hour sessions for children who are 6 years and older. There are also options to do 45 minute sessions for younger students. As well as longer sessions for older students who need to practice more.

There is a list of signs on this website, prior to intervention that determine and help to evaluate the key stages of development in math. If your child is struggling with a number of items that are listed on those tell tale signs, this is an indicator that your child should be evaluated on their number sense and arithmetic knowledge.