Create custom study assistants with Gems

A Gem is a reusable, custom version of Gemini that you program once with your own instructions, then return to whenever you need it. Instead of retyping the same detailed prompt at the start of every session, you build a Gem that already knows your goal, your subject, and the way you like to work. Your gems are stored in a library and are ready for you to pick up exactly where you left off.

When should you use a Gem?

A Gem is worth building when you find yourself doing the same kind of task repeatedly, such as quizzing yourself before exams, tidying the structure of your writing, or working through problem sets in a consistent format. For a genuine one-off question, a normal prompt is faster. As a rule of thumb:

• You have a one-off question → just ask Gemini directly.
• You have a task you repeat with the same rules each time → build a Gem.
• You want to be actively taught a topic step by step → use Guided Learning instead (it is designed for tutoring, whereas a Gem follows whatever instructions you give it).

How to build your first Gem

1. Open the Gems manager. In the Gemini sidebar, select Gems, then New Gem (or "Create a Gem").
2. Give it a persona. Tell the Gem who it should be. For example, "You are an experienced first-year Chemistry tutor".
3. Set the boundaries. Be specific about how it should help. For example, "Don't give me the full solution immediately; instead, point out where my reasoning is going wrong and let me try again".
4. Add knowledge (optional). Upload relevant files, such as your lecture notes or a unit guide, so the Gem can tailor its responses to your actual course content (see Adding knowledge files below).
5. Save and reuse. Your Gem appears in your sidebar, ready to use whenever you need it.

Writing effective Gem instructions

The quality of a Gem depends almost entirely on the instructions you give it. A reliable structure is persona + task + format + constraints:

• Persona – who the Gem is acting as ("an academic writing coach").
• Task – what it should do ("review the logical flow of my essay drafts").
• Format – how the response should look ("give feedback as a short bulleted list, most important issue first").
• Constraints – what it must not do ("do not rewrite my sentences for me; only point to what needs work").

The clearer your constraints, the more useful the Gem. Vague instructions produce vague help. For more on this, see Creating effective prompts with AI.

Gem examples for Monash students

These are starting points. Copy an instruction, adapt it to your unit, and refine it as you go.

• The interactive tutor – test your knowledge.
  • Instruction: "Act as a first-year Chemistry tutor. I will upload my lecture notes, and I want you to quiz me on the key concepts one question at a time. Provide feedback on my answers based only on the provided notes."
• The structural editor – refine your flow (where permitted).
  • Instruction: "You are an academic writing coach. I will provide a draft of my essay. Your job is to check the logical flow between paragraphs and ensure my topic sentences are clear. Do not rewrite the content; only provide suggestions for structural improvement."
• The time manager – organise your study schedule.
  • Instruction: "You are a productivity coach. I will upload information about my assessments, including dates and weightings. Organise all of my units chronologically and suggest when I should start each assessment to meet deadlines comfortably."
• The problem-set coach – build maths and quantitative skills.
  • Instruction: "You are a patient statistics tutor. When I give you a problem, do not give me the answer. Ask me what I think the first step is, and guide me one step at a time. Only confirm the final answer once I have worked it out myself."
• The reading digester – get through dense material faster.
  • Instruction: "I will upload an academic article. Summarise the author's main argument in three sentences, list the key evidence they use, and flag any limitations they acknowledge. Use plain language."
• The exam practice partner – rehearse under exam-style conditions.
  • Instruction: "Act as an exam question writer for my unit. Based on the topics in the notes I upload, write practice short-answer questions in the style of an exam. Wait for my answer before giving model feedback. Do not show me the questions and answers at the same time."

Tip: When you build a Gem, adding files gives it more context and produces more tailored responses. A "Chemistry tutor" Gem with your actual lecture notes attached will quiz you on your course, not generic content.

Adding knowledge files to a Gem

You can attach files, such as lecture slides, readings, a unit guide, and your own notes, directly to a Gem so it draws on them every time, without you re-uploading. This is what makes a Gem feel like it "knows" your subject.

Two things to keep in mind:

• Keep attached files relevant and current. If you swap to a new topic, update the Gem's files so it isn't quizzing you on last month's material.
• A Gem grounded in your uploaded notes is less likely to "hallucinate”, but it is not infallible. Hallucinations are when AI fabricates false information. Always cross-check anything you'll rely on against your unit materials.

Managing and refining your Gems

Your Gems are not fixed once created. Open any Gem to edit its instructions, swap its knowledge files, or rename it. If a Gem isn't behaving the way you want, the fix is almost always in the instructions. Tighten the constraints or add an example of a good response.

Treat your first version as a draft. The most useful Gems are the ones you adjust two or three times after seeing how they actually respond.

Frequently asked questions

Are my Gems and uploaded files private? Yes. When you're logged in with your Monash account, your Gems, prompts, and attached files stay within the Monash environment and are not used to train Google's public models.

Can other students see my Gems? Your Gems are tied to your account. Take care if you ever share a Gem or its instructions, particularly if you've attached files containing your own work or notes as this could result in an academic integrity breach.

What's the difference between a Gem and Guided Learning? A Gem does whatever you instruct it to do. It's best for repeated tasks with consistent rules. Guided Learning is a dedicated tutoring mode that breaks a topic down and checks your understanding as you go. Use a Gem for routine tasks and use Guided Learning to learn new subject material.

Why isn't a Gem giving good answers? It’s probable that the instructions are not refined enough for your particular task. Make the persona, task, format, and constraints more specific, and add a knowledge file so it has your actual material to work from.

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