eLearning can provide people with Intellectual Disability (ID) extended learning opportunities in using information technology, thus potentially increasing digital inclusion. In order to make this a motivating experience, designs of eLearning are required to be compatible with their cognitive abilities. It is as yet unclear how to design an engaging eLearning environment that integrates usability with learning. This paper aims to explore the applicability of learning theories along with usability guidelines in designing an eLearning environment for people with ID. We discuss psychological theories on teaching and learning, and literature on challenges and opportunities of eLearning for people with ID. Based on that understanding, we present guidelines that integrate different learning theories with eLearning, for learner centered interaction design of eLearning modules for people with ID. We present a case study of applying these inclusive design considerations to an eLearning module about health information access.