In CSM, the user is expected to calculate the surface area of the new prism formed when two prisms are brought together in accordance with the instructions. The user is given what to do and the units of length of small prisms. The user obtains a large and new prism by combining the small prisms in accordance with the instruction. The user calculates the surface area of this new prism and writes it in the answer section shown. It is geared towards reading ability.