I do not doubt Mano Singham's good intentions, nor his desire to provide the best science instruction. But his assumptions contain major flaws that run counter to science. Science does not operate through belief but through proof, experimental and mathematical. Once proof has been achieved, belief becomes irrelevant. What is important is to teach the fundamentals of the scientific method.
Belief is antithetical to the scientific search for evidence.
The believer is not concerned with evidence except as it reinforces the belief. The choice between believing in science and believing in pseudoscience is no choice at all. One should believe in neither, but instead look for the evidence. Because science is a collective, rather than an individual, endeavor, we can relate to scientific issues that are beyond our current comprehension. Specializing in applied optics, I have lost intimate contact with the physics and mathematics of cosmology, and I read the same popularized accounts that are available to the layperson.