Teaching Across Subjects: How to Design Lessons That Connect Mathematics, Science, Language and Arts

Teaching Across Subjects: What the Research on Integration Actually Shows, and Its Real Risk

A contributing voice from curriculum research | Specialist in curriculum, pedagogy, and school leadership

NEP 2020’s vision of integrated, multidisciplinary learning requires teachers to see connections between their subjects, and the research on cross-curricular teaching genuinely supports approaches that can deepen understanding across subjects simultaneously. It also documents a real, well-known risk worth stating honestly rather than glossing over: poorly implemented integration can produce shallow coverage of several subjects at once rather than genuine depth in any of them, sometimes described in curriculum research as “a mile wide and an inch deep.” Good integration and superficial integration look similar on a lesson plan; the research identifies what actually separates them.

Key facts

• Curriculum integration research generally distinguishes several levels along a continuum: multidisciplinary approaches (separate subjects linked by a shared theme, but taught largely independently), interdisciplinary approaches (genuine shared concepts and skills deliberately connected across subjects), and transdisciplinary approaches (learning organised entirely around real-world problems, with subject boundaries largely dissolved). These are meaningfully different levels of integration, not interchangeable synonyms, and produce different demands and different likely outcomes.
• A genuine, well-documented concern in this literature is that integration, done superficially, a shared theme with no real conceptual connection between subjects, risks reducing depth of understanding in each individual discipline rather than enhancing understanding across them. This is not a fringe objection; it’s a recognised risk the research on curriculum integration takes seriously rather than dismissing.
• Educational researcher Howard Gardner’s work on disciplinary understanding makes a related, important point: genuine interdisciplinary thinking generally requires strong grounding in each individual discipline first, rather than functioning as a substitute for disciplinary depth. This reframes integration not as an alternative to strong subject teaching, but as something that depends on it.
• The distinguishing factor between effective and superficial integration, across this literature, tends to be genuine conceptual coherence, whether the connection between subjects reflects a real shared idea or skill, versus a surface-level shared topic with no substantive intellectual link.

The risk is real, which is exactly why doing this well matters

A lesson connecting a history topic and a geography topic through a shared date or location is a multidisciplinary link, real, but relatively shallow. A lesson where students use a mathematical concept to genuinely analyse a historical trend is a deeper, interdisciplinary connection, one that can build real understanding in both subjects simultaneously. NEP 2020’s vision points toward the second, and the difference between the two is exactly what determines whether integration helps or hurts.

This distinction matters directly for how a teacher plans cross-curricular content. The temptation, especially under pressure to demonstrate integration, is to reach for surface-level thematic links that are easy to design but don’t produce the genuine conceptual connection that actually deepens understanding. The research suggests that doing fewer, more genuinely coherent interdisciplinary connections is more valuable than doing many shallow, thematic ones.

Five principles for cross-curricular teaching that actually deepens understanding

1. Diagnose whether a planned cross-curricular connection is genuinely conceptual or merely thematic. A shared topic or date is not automatically a meaningful interdisciplinary link; the research distinguishes genuine shared concepts and skills from surface-level thematic pairing, and only the former reliably supports the depth NEP 2020’s vision describes.
2. Ensure disciplinary depth is genuinely maintained, not sacrificed, in the name of integration. Per Gardner’s point about disciplinary understanding as a prerequisite for genuine interdisciplinary thinking, an integrated lesson that shortchanges either subject’s own core concepts is working against, not toward, the depth integration is meant to achieve.
3. Prioritise fewer, more genuinely coherent connections over frequent, shallow ones. Given the documented “mile wide, inch deep” risk, a school or teacher under pressure to demonstrate visible integration is better served by doing this well occasionally than superficially often.
4. Build relationship and shared planning with colleagues in the other subject genuinely involved. Authentic interdisciplinary connections are difficult to construct alone; a teacher planning a cross-curricular unit benefits from genuine collaboration with a colleague who has real depth in the other subject involved, not just borrowing surface content from it.
5. Start with one genuinely coherent connection between two specific subjects, rather than attempting broad integration across the whole curriculum at once. A single, well-designed interdisciplinary unit, built around a real shared concept rather than a shared theme, is a more achievable and more evidence-consistent starting point than a wholesale curriculum redesign.

Frequently asked questions

Does cross-curricular teaching actually deepen understanding, or is that overstated given the “mile wide, inch deep” risk? Both are true, and the distinction matters: genuine, conceptually coherent integration can deepen understanding across subjects, but superficial, purely thematic integration risks the opposite, shallower coverage of each subject rather than deeper understanding of either. The research treats this as a real risk to actively guard against, not a reason to avoid integration altogether.

What’s the actual difference between “multidisciplinary” and “interdisciplinary” teaching? Multidisciplinary approaches link separate subjects through a shared theme while largely teaching them independently; interdisciplinary approaches involve a genuine, shared concept or skill deliberately connected across subjects. The distinction matters because interdisciplinary connections, the deeper kind, are what the depth-focused research actually supports, not simply any thematic pairing.

Does teaching across subjects mean a teacher needs less depth in their own subject? The opposite, according to Gardner’s work on disciplinary understanding: genuine interdisciplinary thinking generally requires strong grounding in each individual discipline first, meaning integration depends on disciplinary depth rather than substituting for it.

What’s the most realistic first step for a teacher wanting to try genuine cross-curricular teaching? Building one specific, genuinely coherent connection with a colleague in another subject, around a real shared concept rather than a shared theme, rather than attempting broad integration across the entire curriculum at once.

What to do:

1. Name one child in your class who is most affected by how cross-curricular connections are currently made in your teaching, and write down one specific, conceptually coherent connection, not just a shared theme, you will build this week, not a general improvement, but a named action for a named child.
2. Search DIKSHA or ask your Block Resource Coordinator for any resource specifically on interdisciplinary curriculum design in your state context. If nothing exists, note that gap; the absence of a resource is itself useful information.
3. Spend five minutes this week checking whether your current cross-curricular content is genuinely conceptual or mainly thematic, not teaching, just watching and noting.
4. Tell one colleague about the “mile wide, inch deep” risk in curriculum integration research, and discuss whether your school’s current integration efforts reflect genuine conceptual coherence or surface-level thematic pairing.
5. At the end of the week, ask yourself what you would try differently next week, and what you would look for, such as whether students can articulate the actual shared concept rather than just the shared topic, to know whether it is working.

Note on sourcing: web search was unavailable during this session, so current, specific citations could not be verified live. The multidisciplinary, interdisciplinary, and transdisciplinary integration taxonomy, the documented “mile wide, inch deep” risk in curriculum integration research, and Howard Gardner’s work on disciplinary understanding as a prerequisite for interdisciplinary thinking reflect well-established, broadly known findings and frameworks in curriculum research, but a reader preparing this for publication should verify specific citations before treating them as fully sourced.

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