Effect of Guided-Inquiry Instruction on Class 8 Science Achievement and Scientific Attitude

Effect of Guided-Inquiry Instruction on Class 8 Science Achievement and Scientific Attitude is a two-semester M.Ed dissertation in the form of a quasi-experimental study set in two government upper-primary schools of a north Indian district. The National Achievement Survey 2021 showed that Grade 8 science learning in Indian schools is uneven and often weak, while NEP 2020 and the NCF-SE 2023 call for experiential, inquiry-driven pedagogy. This study asks the question those documents imply but do not test: does guided inquiry actually move achievement and attitude in a regular government classroom, with its real class sizes, its real syllabus and one real teacher?

Two intact Class 8 sections, taught by the same science teacher, form the experimental and control groups. The experimental section studies the units on force, pressure and friction through a 5E guided-inquiry sequence (Engage–Explore–Explain–Elaborate–Evaluate) built on low-cost activity kits — syringes, balloon rockets, rubber bands; the control section covers the same units through the school's routine textbook method. A blueprint-based achievement test and a Scientific Attitude Scale, both constructed, expert-validated and pilot-tested by the researcher, are administered as pre-tests, immediate post-tests and delayed post-tests.

The analysis uses t-tests and ANCOVA in SPSS with effect sizes, and the dissertation closes with implications for science pedagogy, teacher education and the policy promise of NEP 2020 — written in the voice of a researcher who sat through every period.

Indian policy asks for inquiry-based, experiential science learning — NEP 2020 and the NCF-SE 2023 say so explicitly — while the NAS 2021 evidence shows Grade 8 science achievement to be worryingly uneven, and UDISE+ records confirm that activity infrastructure is scarce in government schools. Between policy and classroom sits an unanswered empirical question: in a regular government Class 8, with intact sections, one teacher and no laboratory, does guided-inquiry teaching measurably improve science achievement and scientific attitude compared with the routine textbook method?

Most available studies are either small demonstrations by enthusiastic individual teachers or laboratory-style experiments unlike real schools. What is missing is a carefully controlled, honestly limited classroom experiment — with validated self-constructed instruments, a fidelity check on the intervention, and analysis that reports effect sizes rather than only significance — that a district education office could actually read and act on. This dissertation supplies that study in the units on force, pressure and friction, where misconceptions are common and low-cost materials make inquiry feasible anywhere.

Abstract

This dissertation reports a quasi-experimental study of guided-inquiry science teaching at the upper-primary level in Indian government schools. Two intact Class 8 sections of comparable government schools (n = 38 experimental, n = 36 control), taught by the same science teacher, were compared on achievement in the units on force, pressure and friction and on scientific attitude. The experimental group was taught through a four-week, twenty-period 5E guided-inquiry sequence with low-cost activity kits; the control group studied the same units through routine textbook teaching. A blueprint-based achievement test and a Scientific Attitude Scale — constructed, expert-validated and pilot-tested by the researcher — were administered before, immediately after, and two weeks after the intervention. Data were analysed descriptively and inferentially (t-tests, ANCOVA with pre-test as covariate, effect sizes) in SPSS.

Introduction

The National Achievement Survey 2021, conducted by the Ministry of Education with NCERT, tested Grade 8 learners across the country in language, mathematics, science and social science, and its report cards exposed wide gaps in science learning between and within states. UDISE+ shows that many government upper-primary schools lack a functioning science laboratory, so 'activity-based teaching' is routinely prescribed but rarely resourced. Policy is unambiguous in intent: NEP 2020 places experiential, hands-on learning at the centre of pedagogy, and the NCF-SE 2023 builds its science curriculum around inquiry. Yet the classroom evidence base — does guided inquiry work in a normal government classroom, at normal scale, with the normal teacher — remains thin at the district level where most Indian children study.

Existing vs proposed

• Existing practice: science in many upper-primary classrooms proceeds chalk-talk-textbook; activities appear as demonstrations before exams; assessment rewards recall; scientific attitude is assumed rather than cultivated.
• Proposed: a controlled comparison in which the 5E cycle — engaging discrepant events, group exploration with low-cost kits, learner explanation, application, and evaluation — runs for the full unit under normal timetabling, with validated instruments measuring what actually changes.

Feasibility

• Technical: the 5E lessons use kits costing a few hundred rupees in total (syringes, balloons, thread, sandpaper, candles), within any school's reach.
• Operational: the same teacher teaches both sections, so the comparison isolates the method rather than the teacher; the researcher supports the experimental section with lesson plans and kit management only.
• Ethical: school permission from the head and the district office, parental informed consent and child assent, anonymised student codes, and a commitment that control-group students receive the kits and activity sessions after the delayed post-test.
• Academic: the design, instruments and analysis plan sit squarely within the M.Ed research-methodology and statistics coursework, with the supervisor reviewing every stage.

In scope

• Two co-educational government upper-primary schools in one district, each contributing one intact Class 8 section (total n ≈ 74).
• The units on force, pressure and friction from the state-adopted, NCERT-based Class 8 science syllabus, taught over four weeks (twenty periods).
• Achievement (blueprint-based test) and scientific attitude (Likert scale) measured at pre-test, immediate post-test and a delayed post-test two weeks later.
• Quantitative analysis: descriptive statistics, t-tests, ANCOVA and effect sizes in SPSS/Excel.
• Documented lesson plans, kits and an observation schedule that other teachers can reuse.

Out of scope

• True randomised assignment — intact sections cannot be reshuffled, and the design says so; randomisation happens at the school level in intent, not at the student level.
• Generalisation to other subjects, other grades, private schools or other states beyond what the discussion honestly claims.
• Qualitative depth via full ethnography; classroom observation is limited to a fidelity checklist with brief field notes.
• Long-term retention beyond the delayed post-test, and any claim about teacher motivation or workload beyond anecdotal field notes.

Research design. Quasi-experimental, pre-test–post-test non-equivalent control group design, chosen because intact Class 8 sections cannot be ethically or practically reshuffled. School-level matching substitutes for randomisation: candidate schools were shortlisted from the UDISE+ database on enrolment, teacher qualification, years of service and science-lab status, and two schools with near-identical profiles were approached.

Sampling. Purposive selection of two matched schools; all consenting students of the two intact sections formed the sample (38 experimental, 36 control). Absentees below 80% attendance were retained but flagged in a sensitivity note.

Instruments. (1) A 40-item achievement test blueprinted across the units' learning outcomes and Bloom's levels (remember/understand/apply split roughly 40/40/20), content-validated by three science educators and two school teachers, piloted on 30 non-sample Class 8 students, with item analysis (difficulty and discrimination) and a KR-20 reliability of 0.81 in the pilot. (2) A 30-item, five-point Likert Scientific Attitude Scale covering curiosity, objectivity, willingness to suspend judgement and enjoyment of investigating; validated by the same panel, with a split-half reliability of 0.78 after Spearman–Brown correction.

Intervention. Twenty 5E periods on force, pressure and friction: each concept opens with a discrepant event, moves to group exploration with kits (syringe presses, balloon rockets, rubbing surfaces), then learner explanation, application to a daily-life context, and exit-card evaluation. The control section's teacher — the same person — follows the school's routine method with the same syllabus periods. A ten-point fidelity checklist (kit use, group work time, learner talk share, wait time) was filled every third period.

Hypotheses. H01: no significant difference in mean post-test achievement between groups after adjusting for pre-test scores. H02: no significant difference in mean post-test scientific attitude. H03: no significant interaction of method with gender.

Analysis. Descriptive statistics; Shapiro–Wilk normality checks; paired and independent t-tests; ANCOVA on post-test scores with pre-test as covariate; Cohen's d for effect size; α = 0.05 throughout, computed in SPSS.

Ethics. Head-of-school and district-office permission; parental informed consent and child assent; student codes instead of names; no identifying data in any table; and kit-based activity sessions for the control group after the delayed post-test.

The study's architecture is its research design: the flow of participants, instruments and analyses, drawn so that the examiner can trace every number in the results chapter back to a stage in the diagram.

Quasi-experimental design flow

flowchart TD
  S1(["School A — experimental section (n = 38)"]) -->|"pre-test: achievement test + attitude scale"| X["4-week 5E guided-inquiry intervention (20 periods, low-cost kits)"]
  S2(["School B — control section (n = 36)"]) -->|"pre-test: achievement test + attitude scale"| Y["Routine textbook teaching (20 periods, same teacher)"]
  X -->|"immediate + delayed post-tests"| A1["Data entry and cleaning (anonymised student codes)"]
  Y -->|"immediate + delayed post-tests"| A1
  A1 --> B1["Descriptive statistics (means, SD, item analysis)"]
  A1 --> B2["Normality checks (Shapiro–Wilk)"]
  B2 --> C1["Paired t-tests within groups"]
  B2 --> C2["ANCOVA: post-test with pre-test as covariate"]
  C2 --> D1["Effect sizes (Cohen's d) + hypotheses decision"]
  D1 --> E["Findings, discussion, implications, dissertation + viva"]

The 5E lesson cycle used in every period of the intervention

flowchart LR
  E1["Engage: discrepant event (inverted glass, floating pin)"] --> E2["Explore: syringe presses and balloon-rocket groups"]
  E2 --> E3["Explain: learner talk first, teacher consolidation after"]
  E3 --> E4["Elaborate: new context — brakes, suction cups, hydraulic machines"]
  E4 --> E5["Evaluate: exit cards and a two-minute concept map"]
  E5 -->|"next concept"| E1

Two design commitments are worth stating in prose. First, the same teacher teaches both sections, so the comparison isolates the method; the researcher only supplies lesson plans, kits and quiet support. Second, the delayed post-test two weeks after the intervention checks whether any gain is learning or mere recency — a control many classroom studies skip and examiners always ask about.

• Replicate across more districts and in private-school and rural-remote settings to test the design's boundary conditions.
• Extend the delayed post-test to a full term to measure retention rather than two-week stability.
• Add a teacher-development arm — does a short 5E workshop for regular teachers produce the same gains without researcher support?
• Convert the kit lists into a district-level costing so a block resource centre can supply them at scale.
• Pair the quantitative design with classroom-discourse analysis to explain why the gains happen, not only that they do.