 In 1989, however, the Social Studies test was changed into a Reading section (which included a social sciences subsection), and the Natural Sciences test was renamed the Science Reasoning test, with more emphasis on problem-solving skills as opposed to memorizing scientific facts.In February 2005, an optional Writing Test was added to the ACT.By the fall of 2017, computer-based ACT tests were available for school-day testing in limited school districts of the US, with greater availability expected in fall of 2018.