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🧪 Lab Report Builder

Fill in each section, then print or save your completed lab report.

Report Info

Title, class, date

Lab Title

Class / Subject

Your Name

Date

Lab Partner(s)

Purpose / Problem Statement

What question is this experiment trying to answer?

Hypothesis

If–Then–Because format recommended

Materials

List all equipment and materials used

Procedure

Numbered, step-by-step instructions

Variables

Identify your independent, dependent, and controlled variables

Independent Variable (what you change)

Dependent Variable (what you measure)

Controlled Variables (what stays the same)

Data / Observations

Build your data table below, then add qualitative observations

Qualitative Observations

Analysis / Calculations

Show calculations, describe trends, interpret results

Conclusion

Restate hypothesis, summarize findings, discuss errors and improvements

Was Your Hypothesis Supported?

Conclusion

Sources of Error

Improvements for Future Experiments

✅

Lab Report Checklist

Check off each item before submitting

📂

Saved Reports

No saved reports yet. Fill in the builder and click Save.

${d.title||'Lab Report'}

Name: ${d.name||'—'} Class: ${d.class||'—'} Date: ${d.date||'—'} ${d.partners?`Partners: ${d.partners}`:''}

1. Purpose

${d.purpose||'—'}

2. Hypothesis

${d.hypothesis||'—'}

3. Materials

${d.materials||'—'}

4. Procedure

${d.procedure||'—'}

5. Variables

Independent: ${d.iv||'—'}

Dependent: ${d.dv||'—'}

Controlled: ${d.cv||'—'}

6. Data & Observations

${makeRows()}

${d.obs||''}

7. Analysis

${d.analysis||'—'}

8. Conclusion

${d.hypoResult||''}

${d.conclusion||'—'}

Sources of Error:

${d.errors||'—'}

Improvements:

${d.improvements||'—'}

`; const w = window.open('','_blank'); w.document.write(html); w.document.close(); setTimeout(()=>w.print(),400); } // --- Tabs --- function switchTab(name, el){ document.querySelectorAll('.tab').forEach(t=>t.classList.remove('active')); document.querySelectorAll('.tab-content').forEach(t=>t.classList.remove('active')); el.classList.add('active'); document.getElementById('tab-'+name).classList.add('active'); if(name==='checklist') renderChecklist(); if(name==='saved') renderSavedList(); } // Init renderDataTable(); // Lab report auto-save var LAB_DRAFT = 'ace_labreport_draft'; function autoSaveLab(){ var fields = ['labTitle','labObjective','labHypothesis','labMaterials','labProcedure','labData','labAnalysis','labConclusion','labErrors']; var draft = {}; fields.forEach(id=>{ var el=document.getElementById(id); if(el) draft[id]=el.value; }); draft.saved = new Date().toLocaleTimeString(); localStorage.setItem(LAB_DRAFT, JSON.stringify(draft)); var el = document.getElementById('labSaveStatus'); if(el){ el.textContent='✓ Auto-saved '+draft.saved; setTimeout(()=>el.textContent='',2000); } } function loadLabDraft(){ var draft = JSON.parse(localStorage.getItem(LAB_DRAFT)||'null'); if(!draft) return; Object.entries(draft).forEach(([id,val])=>{ var el=document.getElementById(id); if(el&&val) el.value=val; }); } document.addEventListener("DOMContentLoaded",()=>{ loadLabDraft(); setInterval(autoSaveLab,30000); });