CEDAR RAPIDS — The Cedar Rapids Community School District plans to spend up to $5 million over the next two years addressing a “learning loss” among students who were driven from classrooms by the COVID-19 pandemic.The $4 to $5 million directed toward that could be used for expanding summer school and increasing after-school learning opportunities.The district’s enrollment dropped by about 600 students this academic year because of the pandemic — meaning less per-pupil state aid — though it expects at least 300 of those students to return in the fall.