This posting offers help with "The Doll House" in terms of the use of foils, supporting characters, and the structure of the play.
Although many people debate about where the climax occurs, I feel that the climax of the play happens when Nora declares her independence from her family. When also examining the play's structure and where the action begins, please look at Ibsen's structure in terms of his classical staticism. Ibsen's significant events occur prior to the play's opening. He cleverly develops the plot and allows the consequences of past circumstances to fuel his play.
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Next, as you examine Acts I and II, please notice how Mrs. Linde serves as a foil to Nora.
As you compare the two characters, focus on their choices in companions; both characters marry for intellectual/economic/practical reasons rather than emotional rationales. For example, Kristina loses her lover, Niles, in order to gain financial security for her mother and brothers. Please see the similarities with Nora since she marries to protect her father's financial status.
Please also notice also how Mrs. L. foils Nora's emotional and communicative states. Since both women cannot express their true feelings to their lovers, their lives and fates result in misery and pain. Their lack of communication causes suffering for themselves and their male companions ...
Climax and foils in Ibsen's Play are explored in this posting using concrete examples.