dear teacher, what does [ a step too far ] and get into the act mean?
A person who has gone 'a step too far' has exceeded the limits or boundaries. The boy went a step too far when he tried to kiss the girl on their first date.
A person is encouraged to participate in an activity when told to 'get into the act.' The teacher told the student to stop socializing and to get into the act of learning how to write a complete sentence correctly.