Target group: studeNts For students, the most difficult Maths subjects in learning online were: ● Geometric concepts ● Equations and inequalities ● Percentage Finnish maths teachers consider Geometric concepts the most difficult topic in learning online, especially regarding: - Circle - Other polygons - Triangle - Pythagorean theorem According to teachers' opinion, inEquations and inequalities, students experienced more difficulties in: - Solve equations (with table, with diagram and with consideration) - Express the unknown from the formula - Solve the inequality (Real numbers); computationally solve the equation and do the test. RegardingPercentage, teachers consideredSolve real life problems, Use of pocket calculator andCalculate with %, the most difficult topics for students in learning online. 25