Most secondary school students, when asked to “just brainstorm”, produce a short list of safe, familiar ideas — then stop. Divergent thinking does not switch on by instruction. In C-Academy’s EDIT Design Thinking® workshops, structured design thinking tools like Random Cards and Idea Dice consistently unlock creative output that open-ended brainstorming sessions rarely produce, particularly with teenage learners who are accustomed to searching for the “correct” answer.
Understanding what is design thinking — and why it works — starts with recognising that creativity is not a talent distributed unevenly across students. It is a capacity that emerges when the right design thinking tools and conditions are in place. At its core, design thinking is a human-centered design methodology — one that puts the needs, behaviours, and experiences of real users at the centre of every stage of the design process. This is the core insight behind C-Academy’s hands-on approach to ideation in schools.
1. Why Divergent Thinking Is Hard to Teach — and Harder to Sustain
Divergent thinking — the ability to generate many possible solutions to complex problems — sits at the heart of MOE’s 21st Century Competencies framework, specifically under Adaptive and Inventive Thinking. A design thinking overview of most secondary school curricula reveals the same pattern: students spend the majority of their learning time in convergent mode — reading, selecting the best answer, refining a single response. The thinking process is almost entirely linear.
The shift to divergent thinking is genuinely difficult, and not because students lack creativity. In C-Academy’s experience working across Singapore secondary schools, the most common sticking point is what facilitators call “evaluation paralysis” — students self-censor ideas before they are even voiced, asking internally, Is this good enough? Is this too weird? This pattern is even more pronounced in classroom activities and student projects that have traditionally rewarded single correct answers over creative exploration.
The second challenge is sustaining divergent thinking beyond the first two or three minutes. Even when students begin well, ideation energy tends to drop sharply once the obvious ideas are exhausted. Without a mechanism to push past that wall, groups default to refining what they already have rather than generating genuinely new directions.
This is precisely why design thinking tools matter in an ideation workshop. They are not gimmicks. They are structured prompts that disrupt familiar thinking patterns and give students a cognitive direction to move in without the pressure of producing something “right.” The non-linear process of design thinking — particularly in the ideation phase — requires tools specifically designed to support it.
2. What Makes a Good Ideation Tool for Secondary School Students
Not every ideation tool works equally well across age groups and contexts. A good ideation tool for design thinking activities for students needs to meet several conditions simultaneously.
Low barrier to entry. Students should be able to pick it up and use it within minutes, without lengthy instruction. Complexity in the tool creates cognitive load that competes with the creative task itself.
Built-in randomness. The tool should introduce an element of surprise that students cannot anticipate. This is the core mechanism that breaks evaluation paralysis — when a random prompt appears, students cannot pre-judge it because they did not see it coming.
Constraint without prescription. The best ideation techniques for students narrow the creative space just enough to give direction, without telling students what to think. They prompt how to think. This is a design thinking principle in action: constraints are generative, not limiting.
Group compatibility. Secondary school students work in groups. A tool that rewards individual output over group riffing tends to produce parallel ideas rather than genuinely collaborative ones. Strong brainstorming tools support team collaboration, not just individual output.
C-Academy’s Random Cards and Idea Dice were developed with all four of these criteria in mind. Both tools emerged from real workshop delivery experience, not from theoretical design — which is why they behave differently in practice from generic brainstorming activities or off-the-shelf design thinking resources.
Common Ideation Tools in Design Thinking Education
A wide range of design thinking activities exists for student use: mind mapping, storyboarding, the SCAMPER method, crazy 8s, reversed brainstorming, the lotus blossom diagram, and circle challenge exercises are among the most widely used. Each has its place. Mind mapping and customer journey maps are particularly effective for organising existing knowledge. Wireframing and collaborative sketching work well in the later stages when ideas are being developed into concepts. The marshmallow tower and similar experiential learning exercises build team collaboration but produce limited idea volume. SWOT analysis and task analysis grids are useful convergent tools but function poorly as generative prompts.
What Random Cards and Idea Dice add to this landscape is a class of tool that is specifically optimised for the generative, non-evaluative stage of ideation — the moment when the goal is quantity over quality, divergence over convergence, and surprise over safety.
3. How Random Cards Work in a Design Thinking Workshop
Random Cards are a set of prompt cards used during the Ideation phase of the EDIT Design Thinking® framework. Each card presents an unexpected stimulus — an image or a word — that students must connect to their design challenge.
The tool contains two types of cards: Random Image Cards and Random Word Cards. Image cards leverage visual stimuli to encourage lateral thinking and association — particularly effective for right-brain thinkers who respond to intuition and imagination. Word cards offer structured, language-based prompts that support critical thinking and problem-solving skills — better suited to students who prefer logical, analytical approaches. A blank card allows students to introduce their own stimulus, and a “What’s Next?” card prompts students to think about the feasibility and execution of ideas generated.
The mechanism is deceptively simple: a student draws a card at random and the group must ask, How does this connect to the problem we are trying to solve? The card does not provide an answer. It provides a direction of association that the group would almost certainly not have arrived at through a standard design process.
In practice, C-Academy facilitators have observed a consistent pattern across workshops: the first reaction to a Random Card is almost always resistance — “That has nothing to do with our problem.” Within roughly 60 to 90 seconds, someone in the group almost always finds a thread. That moment of unexpected connection is frequently where the strongest ideas in the session originate.
This reflects a broader truth about the design thinking process: problem identification and idea generation are not separate steps. They are deeply intertwined. When students connect a random stimulus to a design challenge, they are often reframing the problem at the same time as generating a solution direction.
Best for: Warm-ups before ideation, group brainstorming sessions when ideas plateau, helping quieter learners contribute quickly, and turning abstract themes into concrete directions. Effective for mixed learner profiles — image cards for visual thinkers, word cards for more analytical students.
Caution: Works best when students have a clear problem statement to ideate against. If the Define phase has been skipped or rushed, the associative leaps can feel arbitrary rather than productive.
4. How Idea Dice Unlock a Different Kind of Creative Thinking
Where Random Cards operate through associative thinking, Idea Dice operate through combinatorial thinking. The tool contains nine dice across three categories: Demographics (Users, Occupations, Society), Psychographics (Senses, Emotions, Needs), and Things (Shapes, Platforms, Resources). Students roll multiple dice simultaneously and must respond to the combination.
This structure helps learners move beyond vague problem statements to clear, human-centred frames. The Demographics category prompts students to identify who they are designing for; Psychographics guides thinking about motivations, values, and human needs; Things grounds ideas in concrete situations, objects, and constraints. Together, they produce a prompt matrix that is cognitively distinct from the associative leap required by Random Cards.
Combinatorial thinking is especially effective for students who are more systematic in how they approach complex problems — it gives structure to creativity rather than asking them to make a lateral leap. Idea Dice accelerate idea fluency by giving students “idea seeds” that produce richer diversity of ideas, faster ideation cycles, and stronger candidate directions to converge upon.
In C-Academy workshops, Idea Dice tend to perform particularly well in the later stages of ideation, once the group has already generated an initial set of ideas and needs to push into less obvious territory. The dice introduce specificity that forces students to think about how an idea would actually work — its user, their emotional needs, the platforms and resources involved — not just what it is.
Best for: Groups that need to develop ideas beyond the initial obvious directions; mixed-ability learners who benefit from structured randomness; sessions where human-centred perspectives (user personas, user feedback, user research) need to be embedded into the ideation process.
Caution: Students new to design thinking stages may need a short facilitated introduction before rolling freely. The icon-based format requires interpretation — facilitators should encourage learners to justify their thinking aloud rather than silently connecting dots.
5. What Facilitators Observe When Students Use Structured Ideation Tools
The shift in group dynamics when students use structured design thinking tools — compared to open brainstorming activities — is measurable in behavioural terms. C-Academy’s lead facilitator Yulia Saksen and the wider facilitation team consistently observe the following across school workshops.
Participation becomes more equitable. In open brainstorming sessions, dominant voices tend to set the creative direction early, and quieter students defer. When a card or die introduces a shared random stimulus, every group member starts from the same point. The stimulus is neutral — it belongs to no one — which lowers the social risk of contributing. This makes ideation activities more inclusive across student profiles.
Idea volume increases, particularly after the first five minutes. Open brainstorming typically peaks quickly and then stalls. Random Cards and Idea Dice create natural re-entry points — each new card or roll resets the generative energy. This is the hands-on approach to ideation that distinguishes C-Academy’s methodology from lecture-based design thinking certificate programmes or theory-only instruction.
Cross-disciplinary connections emerge more frequently. Students who would not describe themselves as “creative” — particularly those with strong analytical tendencies — often respond very productively to the combinatorial logic of Idea Dice. The structure makes creative thinking feel tractable. This connects directly to user research and human needs identification: when students are prompted to think across dimensions using persona creation and user personas, they naturally consider the perspective of different users.
Design thinking skills develop visibly within a single session. Facilitators with experience across multiple cohorts report that the design thinking stages in which structured ideation tools are used produce measurably stronger prototyping output than sessions where ideation is left to open brainstorming alone.
Across cohorts, C-Academy’s pre/post competency assessments show a 37% average improvement in overall design thinking competence, with ideation scores contributing consistently to that figure.
6. How C-Academy Uses These Tools in the EDIT Design Thinking® Ideation Stage
Random Cards and Idea Dice are not standalone activities. Within the EDIT Design Thinking® framework — Empathise, Define, Ideate, Test — they belong specifically to the Ideate phase, and their use is structured across two distinct stages: idea dumping and idea sifting.
Idea Dumping: Divergent Thinking Without Judgement
The first stage of the Ideate phase is idea dumping — a period of pure divergent thinking where participants are encouraged to come up with as many ideas as possible, with no right or wrong answers and no judgement. Random Cards and Idea Dice are deployed here as generative triggers. The goal is volume: every idea gets recorded on sticky notes, added to an online whiteboard, or captured through collaborative sketching, regardless of how rough or impractical it appears. This is a deliberate design thinking methodology principle — evaluation paralysis is the enemy of ideation, and structured tools help neutralise it by giving students external direction to follow rather than internal criteria to meet.
Brainstorming tools like reversed brainstorming and the circle challenge can also be incorporated at this stage to push ideas in less expected directions. What matters is that no idea is filtered during the dumping phase. Even ideas that seem unusable often contain the seed of a stronger concept.
Idea Sifting: Convergent Thinking with the Sweet Spot of Innovation
Once all ideas are compiled, the session moves into idea sifting — the convergent phase, where students select the most promising concepts and evaluate them using the Sweet Spot of Innovation framework. This tool asks teams to assess each idea against three dimensions: Is it desirable (do people actually want this)? Is it feasible (can it be built or implemented with available resources)? Is it viable (does it create sustainable value)?
Ideas that score well across all three dimensions sit in the Sweet Spot — the overlap between human desirability, technical feasibility, and economic viability. This framework brings the rigour of design thinking into the creative process, ensuring that brainstorming sessions do not produce lists of uncritical ideas but instead surface genuine candidate concepts ready for rapid prototyping and user testing.
This two-stage structure — divergent first, convergent second — is a deliberate feature of C-Academy’s workshop design. It gives students permission to be exploratory without being undisciplined, and it ensures that the creative output of the ideation phase feeds directly into the prototype development that follows.
7. Choosing the Right Design Thinking Tools for Your Workshop
Teachers and HODs exploring how to build creative thinking in their classrooms often ask: which ideation tool should I use, and when? The short answer is that different tools serve different moments in an innovation workshop, and the best approach is to match the tool to the group’s current needs.
Use Random Cards when: You need to break an early creative block, help quieter students contribute, or inject unexpected directions into a group that has reached consensus too quickly. Random Cards are particularly effective as warm-ups before ideation and for groups where the design problem is concrete and well-defined.
Use Idea Dice when: You need students to move beyond surface-level ideas and engage with the human dimensions of their design challenge — the user’s needs, emotions, and context. Idea Dice work best once a problem statement is clear and students are ready to generate richer, more human-centred concepts.
Other tools to consider: For groups with prior design thinking experience, design sprint formats and rapid prototyping exercises can accelerate the idea-to-prototype cycle. Journey mapping and empathy mapping serve well in the Define phase to set up higher-quality ideation. For groups new to ideation workshop formats, experiential learning warm-ups — including the marshmallow tower challenge — build team collaboration and lower social risk before more focused ideation begins.
Design thinking tools are most effective when they are sequenced thoughtfully across the design thinking stages, rather than used in isolation. C-Academy’s four-session workshop structure is designed with this sequencing in mind — giving students the right tool at the right moment across the full arc from empathy research to final presentation.
For schools interested in embedding these design thinking activities into their ALP or CCE programmes, the Random Cards and Idea Dice are available directly from C-Academy and can be used as standalone ideation toolkits or integrated into a full EDIT Design Thinking® programme for stronger outcomes.
