Lit ChartsAbsolutely awesome resource that has pretty much everything you'd ever need. The visual chart is amazing, and the detailed summary/analysis should be required reading if you want to truly understand the text. Even the symbolic and quote-based sections are really good, and the fact that everything is presented in a way that links to the six biggest themes is the cherry on top of this utterly brilliant guide.
Signet GuideOnline version of the Signet study guide, which covers everything from the historical context to essay topics. It's not VCE specific but is a really good summative resource nonetheless.
Grade Saver GuideAnother great study guide with heaps of detailed analysis. The thematic discussions here are especially good.
Sparknotes GuideThis is a nice and reliable breakdown of the text that treads the line between being a really complex resource like litcharts and being really 'readable' like Shmoop. Most students will end up using this at some point, and if you're prepared to dig into the 'Important Quotations Explained' and 'Themes, Motifs & Symbols' sections, you'll find some great starting points for your analysis.
Cliff NotesFunctionally identical to the Sparknotes guide, basically. There's a little bit more emphasis on chapter and character breakdowns as opposed to major themes and ideas, but this is also a good starting point for later development.
Introductory PowerpointThe first post on this page has a link to a pretty decent overview of the text in powerpoint form. This was written from a VCE Literature perspective though, so although it'd be really impressive if you were to incorporate some of this language-based analysis in your essays, English is more concerned with thematic ideas anyway.
Pink Monkey GuideI know this site looks like it's from 2002, but it's got a bunch of quotes sorted by themes, which is really useful if you can get past the pink hyperlinking. Some of the other sections are a bit brief, but the quote bank is decent.
General Info VideoA brief overview of some important elements of the text, set to inspiring music.
British Library Mini-Documentary on GothicThis is mostly for background/genre information, but this might help you get a grip on the nature of Gothic literature and its key concerns.
Teaching ConceptsThe first three pages of this have some nice, succinct summaries of the text's key concerns, and it explains the structure of the novel quite well too.
Reading Comprehension QuestionsPersonally, I used to hate answering these types of things in my early high school years, but if you're not understanding the text or find it too long and daunting to be discussed, then start here before you progress to the more analytical resources on this list.
Analysis of AlienationThis is a mini-book that examines the core theme of alienation in a tonne of detail, so would be a great read to compliment an essay dealing with this idea or related topics. The second chapter's three way breakdown between Frankenstein, the monster, and Walton is particularly good.
Thematic AnalysisGood rundown of major themes here, and although some of the discussion lacks the kind of supporting evidence you'd be required to use in essays, this is a great overview of key ideas.
Novel Guide SiteAnother text guide with some fairly extensive summaries and character discussions. The link above is for the page analysing metaphors, which is probably the best, but if you scroll down, there'll be links to other information if you need.
Shmoop GuideSomewhat simplistic compared to other resources on this list, but breaks down the text's length and complexity in a more manageable way, and does a good job at explaining some of the more convoluted philosophical ideas embedded in the novel. Try to treat this resource as a stepping stone to better, more sophisticated ones though.
Symbol and Motif TrackerGood breakdown of the occurrences of important symbols and motifs throughout the novel with quotes and analysis to back it up.
Quotes ExplainedJust a short one here that unpacks some of the major quotes in the text.
Student Resource CentreYou can skip over the sections of this that deal with the film adaptation, but the discussion of the link to Prometheus and the mythology is quite helpful.
Analysis of the Monster's MoralityYou may have to answer a survey question to view this (just click the 'no I'm not interested' option, whatever that is) but this is a very well-written piece that closely examines the character of the creature and how his sense of ethical rights and wrongs fit into the text as a whole.
Analytical EssaysThis is just a hub site that'll take you to a few different high quality pieces discussing different themes. I could've just given you the individual links (especially Suzanna Storment's one - that's a great essay,) but I mean, this site has cutesy lightening effects and I think it deserves a spot here.
Sample EssaysNot VCE ones, but you'll be able to read the first few paragraphs of a bunch of essays here if you're looking for some.
Discussion of MonstrosityOnly the first bit of this is viewable, but it sets up a nice discussion about who the true monster is in the text.
Frankenstein and MasculinitySlightly less serious resource, but still brings up some good points about the notion of gender roles and self-perception throughout the novel.