I need teacher who can teach how to use Microsoft Excel and its tips tricks

We are currently working on an online education portal where we will upload videos which can be accessed for free by users to learn various subjects, courses & languages. We're still under construction and you can check out the types of videos we produce at www.edupediaworld.com. You need to sign up and go to 'learn' tab to see these videos. We need someone willing to teach 'Microsoft Excel' in proper English for this portal. We purchase the commercialization right for the videos at $10/hour (according to sum of the total video length recorded). The faculty retains the intellectual property rights and we will also make an exclusive brief profile about you under theSoftware subject's page that would reach to students across the globe!