Online test-prep resources make preparing for national standardized tests, like the ACT and SAT, easily accessible any time (including from home).
Create your own account on ACT Academy [click here], and then you can either take a short quiz (with questions from the four ACT subtests) or enter your results from a previous ACT. This information is then used to create a personalized ACT online test prep study plan which spans several weeks and includes videos across all sections.
Create your own account on Khan Academy [click here], and then you can either take a diagnostic quiz or link your previous PSAT or SAT scores from College Board to Khan Academy's site, which will then create a personalized SAT online test prep study plan for you. Khan Academy has also published study suggestions for parents and students pertaining to school closures due to COVID-19.