A title which would best summarize the content of the text would be: 
The main idea defended by the author in the text is that 
The expression of the text “another tip” (line 5) suggests that the author 
An idiom has been defined as a lexical item (usually a phrase or a clause) whose meaning cannot be derived from the sum of its parts. The idiom in “summer is just around the corner” (line 1-2) means that “summer is: 
The action involved in “to get around a problem” is to: 
The lexical item ´handy´ is used in “Here´s a handy list” (line 4) and “keep it handy” (line 26). In each instance it means respectively: 
The only alternative below which in the text conveys the meaning of ´manner´is: 
In the fragments of the text: “they may lose the desire to master whatever task you are asking them to do” (lines 12-13) and “then you have to do more than just present lessons in the app” (lines 18-19), the verb forms in bold express the ideas, respectively, of 
In the sentence of the text: “However, if you want people to continue using the app, and use it frequently and often, then you have to do more than just present lessons in the app” (lines 17-19), the connector However can be replaced, without any change in meaning, by 